GCA Pro – Mobile App

GCA Pro: the free GST, income tax and compliance app for India

Check a GSTIN, track your ITR refund, verify a notice, calculate tax, make a GST invoice with a UPI QR code and scan papers to PDF. 180+ tools in one Android app, built by Gupta Chandan & Associates.

Download free on Google Play See what is inside How to use it

Free for Android. Most tools need no login. Calculators, scanner and invoicing work offline.

Sample result card you can share in one tap
QR code to download GCA Pro on Google Play

On a computer?Scan with your phone camera to install GCA Pro.

GCA Pro at a glance

GCA Pro is a free Android app from Gupta Chandan & Associates, a Chartered Accountancy and legal advisory firm in New Delhi. It puts the tax and compliance tools you would otherwise look for across many government websites into one app, and adds the everyday tools professionals need: calculators, invoicing, legal documents, a scanner and a compliance calendar.

App name
GCA Pro (the GCA app)
Publisher
Gupta Chandan & Associates, New Delhi
Platform
Android, on Google Play
Price
Free to download, no subscription
What it does
180+ GST, income tax, TDS, MCA, customs and identity tools, 20 calculators, invoicing, legal documents, scanner and compliance calendar
Works offline
Calculators, scanner, PDF tools, invoices, quotations, document wizard, banner maker and calendar
Best for
Business owners, salaried taxpayers, exporters, startups, accountants and CAs
Support
WhatsApp +91 9911369185, email [email protected]
180+Government and compliance tools
20Offline financial calculators
15Legal document templates
3Home-screen widgets

Why people keep GCA Pro on their home screen

Tax and compliance work is full of small, urgent checks. GCA Pro makes each one a few taps.

One search box instead of a dozen portals

Search GSTR-3B, a GSTIN or a PAN once and jump straight to the right official page for GST, Income Tax, TRACES, MCA, ICEGATE, DGFT, UIDAI and more. Save your PAN or GSTIN and Quick Fill types it into the portal form for you.

Works when your network does not

Calculators, the document scanner, PDF tools, GST invoicing, quotations, the legal document wizard, the banner maker and the compliance calendar all run offline.

Share results like a professional

Tap Share on any calculation or portal result and the app builds a branded card image plus a text summary, ready for WhatsApp, email or Telegram.

Never miss a due date

A calendar filtered for your entity type, a home-screen widget showing the next deadline, and one-tap WhatsApp reminders you can send to clients.

Paperwork done in minutes

Create GST invoices with a UPI QR code, send quotations, generate 15 kinds of legal documents as PDF or Word, and scan papers into a clean PDF.

Private by design

Saved PAN, GSTIN, TAN and DIN are encrypted on your phone, the app can be locked with fingerprint, face or PIN, and it asks for no photo library permission.

Get started in three steps

  1. Install the app

    Download GCA Pro free from Google Play. Add your PAN or GSTIN in Settings if you want Quick Fill.

  2. Search or pick a tool

    Tap the search icon and type what you need, such as GSTR-3B, Rent Agreement, Advance Tax or a GSTIN. Or browse the Tools tab and filter by Favorites or Works Offline.

  3. Get the result and share it

    Read the answer in the app, then tap Share to send a branded result card with a text summary on WhatsApp, email or Telegram.

180+ government and compliance tools in 15 categories

Government tools open the official portal page inside the app, so you always see the real source. Open a category to see every tool.

GCA Services

Website services inside the app. Includes: Accounting, GST, Income Tax, Company Formation, Trademark, DSC.23 tools
  • Accounting ServicesBookkeeping and outsourcing services.
  • GST ServicesGST advisory and return filing services.
  • GST Registration OnlineOnline GST registration assistance.
  • GST Return FilingMonthly and quarterly return filing service.
  • Income Tax ServicesIncome tax filing and advisory.
  • Income Tax Return FilingIndividual and corporate ITR filing.
  • TDS Return FilingQuarterly TDS return filing service.
  • New Business SetupEnd-to-end business setup advisory.
  • Company FormationPrivate and Public Limited company incorporation.
  • LLP RegistrationLimited Liability Partnership formation.
  • FSSAI LicenseFood business license registration.
  • Trademark & CopyrightBrand name and creative work registration.
  • Shop & Establishment RegistrationState shop registration.
  • MSME ServicesUdyam registration and advisory.
  • Import Export Code (IEC)Apply for or update IEC.
  • ROC ComplianceAnnual MCA corporate return filings.
  • PF & ESI ServicesEmployee Provident Fund and ESI registration.
  • Other ServicesDigital signatures, insurance and loans.
  • Digital Signature Certificate (DSC)Class 3 DSC token registration.
  • Insurance AdvisoryLife, health and commercial insurance.
  • Loan ArrangementsBusiness and personal loan facilitation.
  • Investment AdvisoryFinancial and tax-saving investment planning.
  • About This AppOfficial GCA mobile app guide page on the website.

Goods & Services Tax (GST)

Look up, track and verify anything on the GST portal. Includes: Search GSTIN, track ARN status, HSN/SAC search, verify e-invoice.23 tools
  • Search GST Number (GSTIN)Look up taxpayer details on services.gst.gov.in.
  • Search GST by PANFind all GSTINs registered against a PAN.
  • Search Temporary IDLook up Composition Scheme taxpayers.
  • Search Composition TaxpayerSearch the public composition list.
  • Track GST Registration (ARN Status)Track ARN registration progress.
  • Home State Selection (TRN)Check pending registration via TRN.
  • Track GST PaymentCheck GST payment challan status on payment.gst.gov.in.
  • Grievance against Payment (GST PMT-07)Log PMT-07 payment grievances.
  • Search HSN / SAC CodeSearch goods HSN and service SAC codes.
  • Generate User ID for Unregistered ApplicantUIN generation for embassies and UN bodies.
  • Cause ListCheck the GST litigation cause list.
  • Verify RFNVerify the Reference Number printed on GST notices.
  • Locate GST PractitionerSearch registered GST practitioners.
  • Search Advance RulingSearch GST Appellate Advance Ruling orders.
  • Track GST Application (Regn. & Refund)Application and RFD-01 refund tracker.
  • Check e-Invoice EnablementCheck if a GSTIN is enabled for e-invoicing.
  • Verify B2B e-InvoiceValidate e-Invoice IRN and QR codes.
  • GST Grievance/ComplaintSelf-service portal for GST complaints on selfservice.gstsystem.in.
  • Latest GST Advisories & ReleasesAuto-updating feed of GST advisories.
  • GST Help ModulesOfficial step-by-step GST help documentation.
  • GST CalculatorIn-app tax calculation, inclusive or exclusive. Works offline.
  • GST Late Fee CalculatorIn-app late fee and Section 50 interest calculation. Works offline.
  • GST Invoice MakerCreate GST invoices with UPI QR codes. Works offline.

E-Way Bill

Everything around goods in transit. Includes: Print e-Way Bill, pin to pin distance, transporter search, blocked GSTIN check.9 tools
  • Search Taxpayer (eWay Bill)Search e-Way Bill registered taxpayers on ewaybillgst.gov.in.
  • Search TransporterLook up registered transporters by Transporter ID.
  • Search Unregistered Person (URP)Unregistered person e-Way Bill lookup.
  • Search Product / HSNLook up product and HSN master data.
  • Search PincodeVerify a PIN code against the e-Way Bill master.
  • Pin to Pin DistanceCalculate the distance between two PIN codes.
  • Print eWay BillView and print an e-Way Bill by EWB number.
  • Check if GSTIN is BlockedCheck if a GSTIN is blocked from e-Way Bill generation.
  • Citizen eWay Bill PortalCitizen-facing e-Way Bill enquiry on mis.ewaybillgst.gov.in.

Notice & Compliance Verification

Check that a notice, certificate or order is genuine. Includes: Verify UDIN, verify CBIC DIN, GSTAT case status and judgements.7 tools
  • Verify UDINVerify the ICAI UDIN on audit reports at udin.icai.org.
  • Verify CBIC DINVerify the Document Identification Number on CBIC and GST notices.
  • CBIC Tax InformationOfficial CBIC circulars and notifications.
  • GSTAT Cause ListGST Appellate Tribunal cause list.
  • GSTAT Case StatusCheck GST Appellate Tribunal case status.
  • GSTAT NoticeView GSTAT presidential orders and notices.
  • GSTAT JudgementSearch published GSTAT appellate judgements.

Export, Customs & Trade

For importers, exporters and shipping teams. Includes: Track container, Bill of Entry status, view any IEC, eBRC, RoDTEP.16 tools
  • ICEGATE Exchange RateOfficial exchange rates on icegate.gov.in.
  • Track ContainerContainer tracking via the Logistics Data Bank.
  • Bill of Entry / IDPMS StatusBill of Entry and IDPMS status enquiry.
  • ICEGATE e-Payment EnquiryCustoms duty payment status.
  • ICEGATE Public EnquiriesComplete ICEGATE public search portal.
  • DGFT: Info for Customs AuthoritiesCustoms reference details on dgft.gov.in.
  • DGFT: View Any IECLook up Importer Exporter Code details.
  • DGFT: e-Misc Payment ServicesDGFT fee payment portal.
  • DGFT: eBRCElectronic Bank Realisation Certificate portal.
  • DGFT: RoDTEPRoDTEP scheme scrip details.
  • Certificate of OriginApply for or track an export Certificate of Origin.
  • LabSetuExporter testing lab portal.
  • Export Promotion MissionExport promotion scheme details.
  • Country GuideInternational trade regulatory guide.
  • EXIM PaathshaalaImport-export training resources.
  • Free Trade AgreementsIndia's FTA trade database.

Income Tax

Your ITR, PAN and refunds without hunting for the right page. Includes: eVerify ITR without login, new PAN instantly, track refund, link Aadhaar with PAN.21 tools
  • eVerify ITR Without Logine-Verify filed returns on the Income Tax e-filing portal.
  • Get New PAN InstantlyApply for an instant e-PAN via Aadhaar e-KYC.
  • Know Payment StatusCheck income tax payment and challan status.
  • Link Aadhaar with PANLink your PAN with Aadhaar.
  • Comply to NoticeRespond to an income tax notice pre-login.
  • Authenticate Notice / Order (DIN)Verify the authenticity of an Income Tax Department notice DIN.
  • Verify Your PANConfirm PAN validity and status.
  • Verify Service RequestService request status lookup.
  • Know Your AOFind your jurisdictional Assessing Officer.
  • Know Your TANSearch TAN details by name and state.
  • Download CSI FileDownload the Challan Status Inquiry file for a TAN.
  • Report Tax EvasionFile tax evasion and Benami property complaints.
  • Income Tax Ready ReckonerOfficial tax tools on incometaxindia.gov.in.
  • DTAA: Double Tax Avoidance AgreementsInternational tax treaty database.
  • Tax Treaty ComparisonCompare DTAA provisions across countries.
  • Request & Download e-PANRequest a duplicate e-PAN.
  • Track Income Tax RefundCheck refund status.
  • Depreciation Rates (IT Act)Depreciation tables under the Income Tax Act.
  • HRA Exemption CalculatorSection 10(13A) HRA exemption. Works offline.
  • Take-Home Salary EstimatorMonthly CTC to in-hand salary. Works offline.
  • Income Tax CalculatorFull Old vs New Regime comparison. Works offline.

TAN, TDS & Protean (NSDL)

Deductors, TRACES and challan checks. Includes: OLTAS challan status, view BIN, verify Form 16/16A, TDS rate chart.15 tools
  • TAN Application (Form 49B)Apply for a new TAN on Protean.
  • Track PAN / TAN StatusCheck PAN or TAN application status.
  • TAN Change RequestRequest corrections to an existing TAN.
  • Apply PAN (NSDL)Register for TDS and TRACES services.
  • OLTAS: Challan StatusVerify tax challan deposit status.
  • TDS Return StatusCheck unauthorized TDS input.
  • Regenerate TDS Return AcknowledgementRe-download TDS receipts.
  • Status of Form 137/24G StatementCheck e-TBAF filing status.
  • View BIN (April 2026 onwards)TRACES Book Identification Number lookup.
  • Check BIN (before April 2026)Historical BIN lookup.
  • TRACES PAN VerificationIndividual PAN verification on TRACES.
  • Verify TDS NoticeTRACES notice DIN verification.
  • Verify TDS CertificateForm 16 and 16A certificate verification.
  • Verify TBRTransaction Based Report verification.
  • TDS Rate ChartCurrent financial year statutory TDS rates.

Company & ROC

Check a company, director or name before you file. Includes: Find CIN, find LLPIN, company name search, verify director DIN, ROC fees.8 tools
  • Verify DIN / PAN Details of DirectorCross-check a Director DIN against PAN on mca.gov.in.
  • Companies/Directors Under ProsecutionSearch MCA prosecution lists.
  • Enquire DIN StatusCheck if a Director Identification Number is active.
  • Find CINSearch a Corporate Identification Number.
  • Find LLPINSearch a Limited Liability Partnership number.
  • ROC Fees CalculatorCalculate official MCA form filing fees.
  • Company / LLP Name SearchCheck availability of a proposed company name.
  • Depreciation Rates (Companies Act)Depreciation schedule under the Companies Act, 2013.

MSME / Udyam

Register and verify small businesses. Includes: Udyam registration, verify Udyam certificate, Delhi shop registration.3 tools
  • Udyam Registration LoginAccess the Udyam portal on udyamregistration.gov.in.
  • Verify Udyam RegistrationVerify a Udyam Registration Certificate.
  • Shop & Establishment Registration DelhiDelhi Labour CIS portal on labourcis.nic.in.

Trademark, Copyright, Patent & Design

Search before you brand, track after you file. Includes: Search trademark across 45 classes, application status, patent search.8 tools
  • Search TrademarkPublic trademark search across 45 classes.
  • Trademark Application StatusTrack trademark application progress.
  • Copyright Application StatusSearch copyright status on copyright.gov.in.
  • Search DesignSearch registered industrial designs.
  • Design Application StatusTrack design registration status.
  • Patent / IPR Public SearchIndian Patent Office public search.
  • WIPO Patentscope (Global)Search international patents on wipo.int.
  • Patent Application StatusTrack patent application status.

Aadhaar & Identity

Manage your Aadhaar from one place. Includes: Generate VID, lock/unlock Aadhaar, download e-Aadhaar, offline PAN/GSTIN/IFSC check.7 tools
  • Generate / Retrieve VIDGenerate a 16-digit Virtual ID on uidai.gov.in.
  • My Aadhaar PortalFull UIDAI resident portal.
  • Tathya Resident LoginTathya resident portal.
  • Verify Email / MobileVerify contact details linked to Aadhaar.
  • Lock / Unlock AadhaarLock or unlock Aadhaar biometrics.
  • Download AadhaarDownload the e-Aadhaar PDF.
  • Check a PAN / GSTIN / IFSC NumberOffline checksum and syntax validator.

Logistics

Track consignments. Includes: Track any courier, track Speed Post, India Post services.3 tools
  • Track Any CourierMulti-carrier courier consignment tracker.
  • Track Speed Post / India PostTrack Speed Post on indiapost.gov.in.
  • India Post: All ServicesFull India Post portal.

GCA Resources & Legal Reference

Forms, codes and the law in one place. Includes: Download forms, Income Tax Act & Rules, search any Act, HSN codes.10 tools
  • Download Forms & FormatsCompliance form templates from guptachandanassociates.com.
  • GCA Tools IndexIndex of firm reference tools.
  • HSN Code: ServicesGST SAC code directory for services.
  • HSN Code: GoodsGST HSN code directory for goods.
  • Trademark Class SearchTrademark class search tool.
  • Document GeneratorAutomated legal document generator wizard. Works offline.
  • Calculator HubCentral repository of all financial calculators.
  • Compliance Calendar (Web)Web compliance calendar.
  • Income Tax Act & RulesFull Income Tax Act database on incometaxindia.gov.in.
  • Search Any Law / Act / RuleCentral statute search on indiacode.nic.in.

More from Futani Digital Platform

Companion learning and cloud tools. Includes: Bare Income Tax Law reader, CA Final prep, private cloud.4 tools
  • Bare Income Tax LawInteractive Income Tax Act reader on incometax.futani.in.
  • Private CloudGCA Cloud WebDAV storage portal.
  • CA Final PrepCA Final exam preparation resource on cafinal.futani.in.
  • FDP ToolsFutani Digital Platform general utilities on fdptools.futani.in.

Utilities & Built-in Tools

The tools that run on your phone, no portal needed. Includes: Document scanner, PDF merge, OCR, Notice Helper, Status Banner, quotations.31 tools
  • Quotation SenderCreate and export PDF business quotations.
  • Compliance Due-Date CalendarNative compliance calendar with reminders.
  • Document ScannerCamera to multi-page PDF document scanner.
  • Image to PDFConvert photos into compiled PDF files.
  • Smart NotesCompliance-aware notebook and scratchpad.
  • Merge PDFsCombine multiple PDF files into one.
  • PDF Password RemoverUnlock password-protected PDFs.
  • Extract PDF PagesSplit and save specific pages from PDFs.
  • Image CompressorShrink photos to fit upload limits.
  • Notice HelperTax notice classification and reply drafting assistant.
  • OCR: Extract Text from ImageOn-device optical text extraction.
  • Calculators & Rate TablesCentral hub for calculators.
  • Recent UpdatesFeed for blogs, videos, podcasts and advisories.
  • My Documents DashboardClient WebDAV document manager.
  • Make a PaymentDirect UPI payment to GCA.
  • Status Banner GeneratorSocial media compliance graphics generator.
  • Loan EMI CalculatorAmortization and EMI calculator.
  • Interest CalculatorSimple and compound interest calculator.
  • Age / Date Difference CalculatorDate gap and limitation period counter.
  • SIP CalculatorMutual fund SIP growth projection.
  • CAGR CalculatorCompound annual growth rate.
  • PPF Calculator15-year PPF maturity projection.
  • FD CalculatorFixed deposit maturity estimator.
  • RD CalculatorRecurring deposit maturity estimator.
  • ROI CalculatorReturn on investment percentage.
  • Margin / Markup CalculatorGross profit margin and markup converter.
  • Inflation CalculatorPurchasing power projection.
  • NPS CalculatorNational Pension System retirement corpus.
  • Gratuity CalculatorGratuity Act payout estimator.
  • Flat vs Reducing RateInterest rate model converter.
  • Credit Card / Debt Payoff CalculatorDebt repayment timeline calculator.

Some portals block in-app viewing. If a page does not load, tap Open in Browser on the alert at the bottom of the screen.

20 financial calculators that work offline

No signal, no problem. Every calculator runs on your phone and has a Share button that turns the result into a branded card.

Tax and GST

  • Income Tax (Old vs New Regime)
  • GST (add or extract)
  • GST late fee and interest
  • HRA exemption
  • Take-home salary from CTC
  • ROC fees

Loans

  • EMI and amortization schedule
  • Loan payoff and prepayment
  • Flat vs reducing rate converter

Savings and investing

  • SIP
  • PPF
  • Fixed deposit (FD)
  • Recurring deposit (RD)
  • NPS
  • Simple and compound interest
  • ROI and CAGR
  • Inflation

Business and everyday

  • Margin and markup
  • Gratuity
  • Age and date difference
Income Tax Calculator: choose AY 2025-26 or AY 2026-27 and your category (individual, senior citizen, super senior or HUF), enter income and deductions, and see the New Regime (Section 115BAC) and Old Regime side by side with 4% cess, Section 87A rebate and the better option. GST Late Fee Calculator: covers GSTR-3B, GSTR-1, GSTR-4, CMP-08, GSTR-7 and GSTR-9, with interest at 18% or 24% p.a.

Run your paperwork from your phone

Invoices, quotations, agreements and notice replies, all without opening a laptop.

GST Invoice Maker

Save your business profile once, pick a customer from Party Vault, add items with HSN or SAC and GST rate, and the app calculates CGST and SGST or IGST, converts the total into words and prints a UPI QR code on the PDF. Choose Tax Invoice or Bill of Supply.

  • Tax Invoice
  • Bill of Supply
  • UPI QR
  • BHIM
  • Google Pay
  • PhonePe
  • Paytm

Quotation Maker

Build a clean branded quotation with line items, discount, GST rate, payment terms and a validity date, then send the PDF on WhatsApp or email.

Legal Document Generator

Pick a template, fill a guided form (or pull party details from Party Vault), preview the clauses, then export a print-ready PDF or an editable Word file.

Tax Notice Helper

Choose Income Tax or GST, select the notice section or form, and read a plain-language summary with a compliance checklist. Then generate a structured response outline to work from.

  • 143(1) Intimation
  • 142(1) Inquiry
  • 148 Reassessment
  • ASMT-10 Scrutiny
  • DRC-01 Demand

Status Banner Generator

Make branded graphics for WhatsApp Status, LinkedIn and other social posts: due-date extension alerts, tax digests, urgent deadline alerts and firm announcements. Square (1080x1080) or story (1080x1920) size, then share or download as PNG.

  • Due Date Extension Alert
  • Tax Digest
  • Urgent Deadline
  • Firm Announcement

Party Vault

Keep client and vendor GSTINs, addresses and state codes in one place and reuse them across invoices, quotations and legal documents.

Document Generator templates: Rent Agreement / Residential Lease Deed, Partnership Deed, General Power of Attorney, Non-Disclosure Agreement (NDA), NOC for Registered Office, Affidavit for Name or Address Change, Commercial Property Lease Deed, Employment Offer Letter & Non-Compete, Service Level Agreement (SLA), Board Resolution (bank account / GST), Share Purchase / Transfer Agreement, Consulting Services Agreement, Professional Resume / CV, Promissory Note & Debt Acknowledgment, Gift Deed (cash / property). Export as PDF or editable Word (DOCX). Please have important legal documents reviewed by a professional before signing.

Scan, convert and shrink documents

A full document toolkit that runs on your phone, with no photo library permission needed.

Document Scanner

Photograph pages, drag the corners to fit, choose Auto Enhance, Grayscale or Black and White, and save one multi-page PDF.

PDF and image tools

Turn photos into a PDF, merge PDFs, remove a password from your own PDF, extract selected pages, compress images to meet portal upload limits (for example under 200 KB) and pull text out of images with on-device OCR.

  • Image to PDF
  • Merge PDFs
  • PDF Password Remover
  • Extract Pages
  • Image Compressor
  • OCR

A compliance calendar that reminds you and your clients

Due-date calendar

Filter statutory due dates for individuals, proprietorships, partnerships, LLPs or companies. Tap Mark as Filed and the entry turns green and stops reminding you.

WhatsApp client reminders

Open the client directory, tap Remind Client, and the app checks the phone number and writes a ready-to-send WhatsApp or SMS deadline message.

Three home-screen widgets

Long-press your home screen, choose Widgets, find GCA Pro and add the one you need.

  • Next Compliance Deadline (3x1)
  • Quick Tools (3x2)
  • Smart Notes Scratchpad (3x2)

Updates feed

One feed for GCA blog posts, YouTube video guides, podcasts and official advisories from the GST Portal, Income Tax e-Portal, MCA and CBIC.

  • All
  • Blogs
  • Videos
  • Podcasts
  • Govt Advisories

GCA Cloud and security

Keep documents organised and your identifiers protected.

GCA Cloud workspace

Sign in with Google or your registered email to browse your folders by year and category (for example GST and Income Tax), upload scanned returns and download documents shared by the firm.

Encrypted identifiers vault

PAN, GSTIN, TAN and DIN are encrypted with AES-256-GCM in the Android Keystore, with zero-knowledge sync across your devices.

Biometric app lock

Require fingerprint, face unlock or a 4-digit PIN every time the app opens.

Your data, your control

The app uses scoped storage and does not read your photo library. Erase local data or delete your account any time from Settings.

Who GCA Pro is for

Business owners and traders
Make GST invoices with UPI QR, check a customer's GSTIN before you bill, print e-Way Bills and track due dates.
Salaried people and taxpayers
Compare Old vs New Regime, work out HRA and take-home pay, e-verify your ITR, track your refund and link PAN with Aadhaar.
Exporters and importers
Track containers, check Bill of Entry and IDPMS status, view any IEC, follow eBRC and RoDTEP and compare free trade agreements.
Startups and founders
Search company and trademark names, find a CIN or LLPIN, check ROC fees, register on Udyam and draft agreements.
CAs, accountants and tax professionals
Verify UDIN and DIN, draft notice response outlines, send client reminders, make due-date banners and share files through GCA Cloud.

How to use GCA Pro: step-by-step guides

Short, numbered instructions for the main tools, taken from the GCA Pro user manual. Open any guide to see the steps.

Getting around the app

How to: Find any tool with Global Search

  1. Tap the Search icon at the top right of the app bar.
  2. Type what you need, for example GSTR-3B, Rent Agreement, Advance Tax or a GSTIN.
  3. See matching tools, saved identifiers, cloud documents and compliance deadlines in one list.

How to: Use a government portal tool (with Quick Fill)

  1. Open the Tools tab, or find the tool in Global Search.
  2. Tap the tool card, for example Search GST Number, Track ITR Status or View Company Master Data.
  3. The official portal page loads inside the app.
  4. If you saved your PAN or GSTIN in Settings, tap Quick Fill on the bar above the page to fill it into the form.
  5. If a portal will not load in the app, tap Open in Browser on the alert at the bottom of the screen.
  6. Tap Share at the top to send the result as a branded card.

How to: Switch between Light and Dark mode

  1. Open the menu and tap Settings.
  2. Tap App Theme.
  3. Choose System Default, Light Mode or Dark Mode.

How to: Filter the Tools tab

  1. Open the Tools tab to browse all tools.
  2. Use the quick filters: All Tools, Favorites or Works Offline.

Calculators (all work offline)

How to: Income Tax Calculator (Old vs New Regime)

  1. Choose the Assessment Year, AY 2025-26 or AY 2026-27.
  2. Choose the category: Individual under 60, Senior Citizen 60-80, Super Senior over 80, or HUF.
  3. Enter income: gross salary, rental income, interest income and other income.
  4. Enter deductions: HRA exemption, Section 80C, 80D, 80CCD(1B) and home loan interest under Section 24(b).
  5. Tap Calculate to compare the New Regime (Section 115BAC) and Old Regime side by side, with 4% cess, Section 87A rebate and the better option.

How to: GST Calculator

  1. Choose Add GST (net to gross) or Extract GST (gross to net).
  2. Enter the amount and pick the rate: 0.25%, 3%, 5%, 12%, 18%, 28% or Custom.
  3. Tap Calculate to see the net amount, CGST, SGST, IGST and gross amount.

How to: GST Late Fee and Interest Calculator

  1. Choose the return type: GSTR-3B or GSTR-1, GSTR-4 or CMP-08, GSTR-7, or GSTR-9.
  2. For GSTR-9, also enter annual turnover so the statutory cap is applied.
  3. Enter the tax liability and the number of days delayed.
  4. Choose the interest rate: 18% p.a. for late payment or 24% p.a. for wrongly availed ITC.
  5. Tap Calculate to see the late fee (CGST and SGST split), interest and total payable.

How to: EMI and Loan Amortization Calculator

  1. Enter the principal, interest rate (% p.a.) and tenure in years or months.
  2. See the monthly EMI, total interest, total payment and the amortization schedule.

How to: Loan Payoff and Prepayment Calculator

  1. Enter the outstanding principal, current interest rate and current EMI.
  2. Enter the prepayment, either a lump sum or a monthly increase.
  3. See the interest saved and how many months shorter the loan becomes.

How to: Simple and Compound Interest Calculator

  1. Enter the principal, interest rate, time period and compounding frequency (daily, monthly, quarterly or yearly).
  2. See the interest amount and the maturity balance.

How to: SIP Calculator

  1. Enter the monthly investment, expected annual return (%) and duration in years.
  2. See the total invested, estimated gains and maturity value.

How to: PPF Calculator

  1. Enter the annual deposit, up to 1,50,000 rupees.
  2. See the 15-year maturity schedule with interest earned each year.

How to: Fixed Deposit (FD) Calculator

  1. Enter the deposit amount, interest rate, tenure and payout option (simple or quarterly compounded).
  2. See the maturity amount and net interest earned.

How to: Recurring Deposit (RD) Calculator

  1. Enter the monthly deposit, interest rate and duration in months.
  2. See the maturity corpus with quarterly compounding.

How to: ROI and CAGR Calculator

  1. Enter the initial investment value, final value and duration in years.
  2. See the total percentage return (ROI) and the CAGR.

How to: Inflation Calculator

  1. Enter the current cost, estimated inflation rate and number of future years.
  2. See the future cost of living or the equivalent future purchasing value.

How to: Margin and Markup Calculator

  1. Enter the cost price and your desired gross margin % or markup %.
  2. See the selling price, gross profit and the converted markup or margin.

How to: Gratuity Calculator

  1. Enter the last drawn basic salary plus DA and the completed years of service.
  2. See the gratuity under the Payment of Gratuity Act, 1972, calculated as 15 x salary x years / 26.

How to: NPS Calculator

  1. Enter the monthly NPS contribution, current age, retirement age (60) and expected return.
  2. See the total corpus, the 60% lump sum and the monthly pension.

How to: HRA Exemption Calculator

  1. Enter basic salary plus DA, HRA received, rent paid and city type (Metro or Non-Metro).
  2. See the tax-exempt HRA under Section 10(13A) and the taxable HRA.

How to: Take-Home Salary Estimator

  1. Enter your annual CTC.
  2. See the breakup into basic, HRA, allowances, PF, professional tax and tax, and your monthly take-home.

How to: Age and Date Difference Calculator

  1. Pick a start date and an end date.
  2. See the gap in years, months, days, total weeks and total days.

How to: Flat vs Reducing Rate Converter

  1. Enter the quoted flat interest rate and tenure.
  2. See the equivalent effective reducing-balance rate (EAR).

How to: ROC Fees Calculator

  1. Choose the company type and the authorised capital slab.
  2. See the official MCA form filing fee and the late filing fee.

Documents, invoices and notices

How to: Generate a legal document

  1. Open Tools and tap Document Generator.
  2. Choose a template from the 15 types, such as Rent Agreement, Partnership Deed or NOC for GST registration.
  3. Fill the form: first and second party names, PAN, Aadhaar and address, or tap Pick from Party Vault to auto-fill. Then add the terms such as rent or loan amount, security deposit, lock-in period and jurisdiction.
  4. Tap Preview to read the generated clauses.
  5. Tap Export PDF for a print-ready file or Export DOCX for an editable Word document. Files save to your Downloads folder.

How to: Create a quotation

  1. Open Tools and tap Quotation Sender, then Create Quotation.
  2. Pick a customer from Party Vault or enter new client details.
  3. Add line items with description, HSN or SAC, quantity, unit rate, discount % and GST rate.
  4. Add payment terms, a validity date and acceptance notes.
  5. Tap Generate PDF and share it on WhatsApp or email.

How to: Create a GST invoice with UPI QR

  1. Open Tools and tap GST Invoice Maker.
  2. Set up your business profile once: trade name, GSTIN, address, bank name, account number, IFSC and UPI ID.
  3. Tap Create Invoice, pick the customer and choose Tax Invoice or Bill of Supply.
  4. Add line items with HSN or SAC, rate and GST %. CGST and SGST (same state) or IGST (other state) is worked out for you, and the total is written in words.
  5. A UPI QR code is placed on the PDF so the customer can pay with BHIM, Google Pay, PhonePe or Paytm.
  6. Tap Export PDF or Share Invoice.

How to: Prepare a tax notice reply outline

  1. Open Tools and tap Notice Helper.
  2. Choose the authority: Income Tax or GST.
  3. Choose the notice section or form, such as 143(1) Intimation, 142(1) Inquiry, 148 Reassessment, ASMT-10 Scrutiny or DRC-01 Demand.
  4. Read the notice summary and the compliance checklist.
  5. Tap Generate Response Outline to get a structured outline for your written reply.

How to: Make a status banner for WhatsApp or social media

  1. Open Tools and tap Status Banner Generator.
  2. Choose the category: Due Date Extension Alert, Tax Digest, Urgent Compliance Deadline or Firm Announcement.
  3. Choose the size: Square (1080x1080) for WhatsApp and LinkedIn posts, or Story (1080x1920) for WhatsApp Status.
  4. Edit the text, dates, colors and contact details.
  5. Tap Share Image or Download PNG.

How to: Share a branded result card

  1. Finish any calculation or load any portal lookup.
  2. Tap the Share button on the top toolbar.
  3. The app creates a 1080px branded card with the date, summary rows and the Play Store link.
  4. Pick WhatsApp, email or Telegram from the share sheet to send the image together with a text summary.

Scanner and PDF tools

How to: Scan documents to PDF

  1. Open Tools and tap Document Scanner.
  2. Tap Capture to photograph each page.
  3. Drag the corner handles to fit the page edges.
  4. Choose a filter: Auto Enhance, Grayscale or Black and White.
  5. Tap Generate PDF to save one multi-page PDF.

How to: Convert, merge, unlock, split and compress

  1. Image to PDF: select photos from the gallery, reorder the pages and convert.
  2. Merge PDFs: select two or more PDFs and combine them.
  3. PDF Password Remover: enter the password once to permanently unlock your own PDF.
  4. Extract PDF Pages: split a large PDF and save only the pages you pick.
  5. Image Compressor: shrink a photo to meet portal upload limits, for example under 200 KB.
  6. OCR: pull searchable text out of a document image on your phone.

Calendar, widgets, cloud and security

How to: Track due dates and mark returns as filed

  1. Open the Calendar tab, or Tools and then Compliance Due-Date Calendar.
  2. Filter by entity: Individual, Proprietorship, Partnership, LLP or Company.
  3. Read the upcoming due dates in date order.
  4. Tap Mark as Filed next to a completed return. It turns green and its reminders stop.

How to: Send WhatsApp reminders to clients

  1. Open the client directory and tap Remind Client.
  2. The app checks the phone number and writes a ready-to-send WhatsApp or SMS deadline message.
  3. Send it in one tap.

How to: Add the home-screen widgets

  1. Long-press an empty area of your Android home screen and choose Widgets.
  2. Scroll to GCA Pro.
  3. Drag a widget onto the screen: Next Compliance Deadline (3x1), Quick Tools (3x2) or Smart Notes Scratchpad (3x2).

How to: Sign in and use GCA Cloud and Party Vault

  1. Open the GCA Cloud tab and sign in with your Google account or registered email.
  2. Browse your folders by year and category, upload scanned returns or download firm documents.
  3. Use Party Vault to save client and vendor GSTINs, addresses and state codes for reuse in invoices, quotations and legal documents.

How to: Read the Updates feed

  1. Open Tools and tap Recent Updates.
  2. Pick a filter chip: All, Blogs, Videos, Podcasts, Govt Advisories or Notifications.
  3. Tap any item to open the article or official advisory.

How to: Lock the app and erase your data

  1. Open Settings and turn on App Lock to require fingerprint, face unlock or a 4-digit PIN at launch.
  2. To wipe data stored on the phone, tap Erase Local Data in Settings.
  3. To remove your account, tap Delete Account in Settings.

Frequently asked questions about GCA Pro

What is GCA Pro?

GCA Pro is a free Android app from Gupta Chandan & Associates, a Chartered Accountancy and legal advisory firm in New Delhi. It brings 180+ GST, income tax, TDS, MCA, customs and identity tools together with 20 financial calculators, a GST invoice maker, a legal document generator, a document scanner, a compliance calendar and a private cloud workspace.

Is the GCA Pro app free?

Yes. GCA Pro is free to download from Google Play and there is no subscription. Most tools can be used without logging in. You sign in with Google or a registered email only to use the GCA Cloud workspace.

Which phones does GCA Pro work on?

GCA Pro is currently available for Android phones through Google Play. It is not listed for iPhone at the moment.

Does GCA Pro work offline?

Yes, for the tools that run on your phone. All 20 financial calculators, the document scanner, PDF utilities, the GST invoice maker, the quotation maker, the legal document wizard, the status banner generator and the compliance calendar work without internet. Lookups on government portals need a connection because they load the official portal pages.

Is GCA Pro an official government app?

No. Gupta Chandan & Associates is a private professional firm and is not affiliated with any government department. The government tools open the official portal pages inside the app for your convenience, and the data comes from those portals.

Can I make a GST invoice with a UPI QR code in the app?

Yes. Save your business profile once, add your customer, line items, HSN or SAC and GST rate. The app works out CGST and SGST (same state) or IGST (other state), writes the total in words and prints a UPI QR code on the PDF so the customer can pay through BHIM, Google Pay, PhonePe or Paytm.

Which legal documents can I generate?

The Document Generator has 15 templates, including rent agreement, partnership deed, power of attorney, NDA, NOC for registered office, affidavits, lease deeds, board resolutions, share transfer agreement, consulting agreement, resume and gift deed. You fill a guided form, preview the clauses and export a PDF or an editable Word (DOCX) file. Have important documents checked by a professional before signing.

Can the app help me reply to an income tax or GST notice?

The Notice Helper lets you pick Income Tax or GST, choose the notice section or form (for example 143(1), 142(1), 148, ASMT-10 or DRC-01), read a plain summary with a compliance checklist and generate a structured response outline. It is a starting point and not a substitute for professional advice on your case.

How does the compliance calendar and reminder feature work?

Filter due dates by entity type (individual, proprietorship, partnership, LLP or company), mark returns as filed to silence their reminders, and add a home-screen widget that always shows the next deadline. Professionals can also send pre-formatted WhatsApp or SMS deadline reminders to clients from the client directory.

Is my data safe in GCA Pro?

PAN, GSTIN, TAN and DIN you save are encrypted with AES-256-GCM using the Android Keystore. You can turn on a fingerprint, face unlock or 4-digit PIN lock, the app does not ask for photo library permission, and you can erase local data or delete your account from Settings.

A government portal does not load inside the app. What should I do?

Tap Open in Browser on the alert at the bottom of the screen to open the same portal in your phone browser.

How do I get help with the app?

Message the GCA team on WhatsApp at +91 9911369185 or email [email protected].

Put 180+ compliance tools in your pocket

Download GCA Pro free and have the answer to your next GST, income tax or MCA question one tap away.

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Need an expert to do the filing for you? Gupta Chandan & Associates handles GST, income tax, ROC compliance, business setup, trademark, PF and ESI, MSME, IEC and DSC for clients across India. Email [email protected] or call +91 9911369185.

Last updated October 2026