InvoiceOnGo Billing GST App

InvoiceOnGo is a fast, private GST invoicing app for Indian businesses, freelancers, and shopkeepers. Create professional GST invoices, bills, and quotations in seconds — and everything stays on your phone. No account, no sign-up, no data uploaded to anyone's server.

★ BUILT FOR INDIAN GST • Automatic CGST + SGST for in-state sales and IGST for inter-state sales • Set your place of supply once; tax is calculated correctly every time • Offline HSN/SAC → GST rate table you can view and edit • Tax-inclusive or tax-exclusive rates, discounts, and multiple tax slabs

★ PROFESSIONAL INVOICES & QUOTATIONS • 5 clean invoice templates — pick one and set your default • Add your logo, business details, GSTIN, and bank/UPI payment details • Generate polished PDF invoices ready to share on WhatsApp, email, or print • Create quotations and convert your workflow from estimate to invoice

★ GET PAID & STAY ORGANISED • Record payments and track what's paid, unpaid, and overdue • See outstanding totals and recent activity on your home screen • Search invoices and clients instantly • Maintain a reusable catalog of items and clients

★ YOUR DATA STAYS YOURS • Fully on-device — no backend, no cloud account required • Back up and restore to YOUR own cloud (Google Drive, OneDrive, Dropbox) or local storage • Nothing leaves your phone unless you choose to share it

★ SIGN & SECURE • Add your signature image to every document • Sign invoices with a digital certificate (DSC / .pfx / .p12) — PAdES compliant • Lock the app with a 4-digit PIN or fingerprint / face unlock

★ SMART TAX HELP (OPTIONAL) • Optional AI tax assistant suggests GST rates for an item description • Uses your own API key — you stay in control, and it's always advisory

★ WORKS ON PHONES & TABLETS • Adapts to large screens and foldables • Light and dark themes with your choice of accent colour.

Whether you run a small shop, a growing business, or freelance on the side, InvoiceOnGo helps you bill quickly, look professional, and keep your financial data completely under your control.

Download InvoiceOnGo and send your first GST invoice today.

Recent changes:
ver 1.3 is biggest update for Pro Users
-> Now sign in with Google to sync your data
-> New website version for users - invoiceongo.in - sign in with your same google account and you will see your mobile data on web
-> Option to opt-out and remain on device only.
For all
-> New look and feel
-> Improved performance
-> Improved user experience.