A five-stop tour of the app followed by a complete reference — invoicing, GST, signing, backup, and the rest — for whenever you need the details.
There's no in-app walkthrough today, so start here. Each stop matches a tab of the bottom navigation bar — work left to right and you've seen the whole app.
Where you land every time you open the app.
Every quotation and invoice you've made, searchable.
Your clients and your price list, two tabs on one screen.
Hand your books to your accountant without exporting each invoice by hand.
Everything that makes an invoice yours, grouped into four cards.
Setting up for the first time? Head to the Getting started section of the guide below for the order that saves you rework — business profile before templates, signature before your first send.
Everything from the tour, in more detail, plus the things you'd only look up once: GST mechanics, signing, backup, and what the app deliberately doesn't do.
Nothing is mandatory before you can bill someone — but doing these roughly in order means you won't have to re-open a finished invoice to fix your own details.
Business Profile has a one-tap Detect from GPS button for country/state — it's a one-time, on-device lookup; nothing is stored or sent anywhere.
A Quotation (QTN) and an Invoice (INV) are the same editor with different numbering; convert a quotation to an invoice later from its menu once the client's said yes.
One screen, two tabs — everything you'd otherwise retype on every invoice.
Tax behaviour follows your business profile's country. India gets full GST math; every other country gets one plain Tax line per item.
INV-2026-27-0001. Quotations and non-India invoices use a flat sequence: INV-0001. Numbers are gap-free — if a finalize fails partway, that number is released, not burned.Not in this app: no e-way bills, no e-invoicing/IRN generation, no GST-portal connection of any kind — this is an invoice generator, not a filing tool. The GST Tax Invoice template's "Reverse charge" line always prints "No"; there's no toggle for it yet.
Two different features that both put a signature on the PDF — pick based on whether you need it to look signed or to be cryptographically signed.
.pfx/.p12) + password. Signing (via the Preview screen's Sign button) produces a real PAdES/CAdES-detached cryptographic signature, using BouncyCastle + PDFBox under the hood..xlsx with three sheets: Summary (taxable value, CGST/SGST/IGST, invoiced/received/outstanding), Invoices (number, date, client, GSTIN, place of supply, tax split, total, balance), Line items (HSN/SAC, qty, rate, discount, GST, line total)..zip — database, preferences, logos, generated PDFs — to any destination you pick: Drive, OneDrive, Dropbox, or local storage. It's a plain file, not a proprietary sync..zip (100MB cap), and the app restarts itself to apply it — a background swap can't safely happen otherwise.Every screen under the Settings tab, grouped the way the app groups them.
| Group | Screen | What it's for |
|---|---|---|
| Business | Business Profile | Logo, contact info, GSTIN, currency, payment/bank details, default terms |
| Business | Invoice Templates | Pick your default of the five PDF designs |
| Business | Appearance & Invoice Design | Accent color, theme, PDF section toggles |
| Tax | AI Tax Assistant | Provider, API key, model — for tax-rate suggestions |
| Tax | GST Rate Table | View and edit the offline HSN → rate lookup |
| Data & Security | App Lock | PIN and biometric unlock |
| Data & Security | Signature | Signature image shown on every document |
| Data & Security | Digital Signature (DSC) | Cryptographic certificate for PDF signing |
| Data & Security | Backup & Restore | Manual ZIP backup to any cloud or storage you choose |
| Help & Support | Contact Support | Opens your email client, pre-filled with version/device info |
| Help & Support | Privacy Policy | Full plain-language policy, in-app |
Can I run two businesses from one install?
Not yet — the business profile is a single record per install, so it's one business at a time.
Does it file e-way bills or generate e-invoice IRNs?
No. InvoiceOnGo is fully offline by design and has no connection to the GST portal — it produces the invoice PDF and, if you want it, the accountant's Excel export. Nothing is filed anywhere.
Can invoices repeat automatically?
Not yet — there's no recurring or scheduled invoicing. Every document is created explicitly.
Can I sign with a USB token (hardware DSC)?
No — only software certificates (.pfx/.p12) are supported.
What happens if I bill more of an item than I have in stock?
It's allowed. The app flags the shortfall so you know to restock, rather than blocking the sale outright.