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. New in v1.2.0? See what's new.
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.
Downloads/InvoiceOnGo, or to a folder you choose.Everything that makes an invoice yours, grouped into 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 your state - it's a one-time, on-device lookup; nothing is stored or sent anywhere.
Every feature is yours to try for 3 days. After that, a one-time purchase unlocks the app for good.
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.
A finalized invoice is never edited in place. It's corrected the way GST expects: take part of it back with a credit note, or cancel it outright.
CN-2026-27-0001.Already reported the invoice in GSTR-1? A credit note is usually the right correction rather than cancelling. Check with your CA if unsure.
One screen, two tabs - everything you'd otherwise retype on every invoice.
InvoiceOnGo is built for businesses in India: every invoice gets full GST math - CGST + SGST or IGST, HSN/SAC and place of supply.
INV-2026-27-0001, CN-2026-27-0001. Quotations use a flat sequence: QTN-0001. A number is taken in the same step that saves the document, so it can never be burned or handed out twice - even after restoring an older backup - and never runs past GST's 16-character limit.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. Suggested rates are a starting point: confirm them with your CA.
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: Summary (counts incl. cancelled documents and credit notes; per currency: taxable value, CGST/SGST/IGST, round off, invoiced, received, outstanding, credit notes and the net), Invoices and Credit notes (number, date, client, GSTIN, place of supply, against which invoice, reverse charge, tax split, total, credited, received, balance), Drafts & quotations kept apart so they're never summed as sales, and Line items (HSN/SAC, qty, rate, discount, GST, line total).Downloads/InvoiceOnGo (or a folder you pick), asking before it overwrites files already there..zip - database, settings, logo and signature images, and your digitally signed PDFs - to any destination you pick: Drive, OneDrive, Dropbox, or local storage. Ordinary PDFs aren't included; they're re-created from the data exactly as issued. Every backup is checked the same way a restore checks it before it's saved ("Backup saved and checked")..zip (100MB cap). It's checked first - a file that isn't a backup, a damaged one, or one made by a newer version of the app is turned away and nothing changes. A good backup is applied when the app restarts (it restarts itself); if anything goes wrong while swapping, your previous data is put back. The Backup screen says how the last restore went, and a waiting restore can be cancelled.Every screen under the Settings tab, grouped the way the app groups them.
| Group | Screen | What it's for |
|---|---|---|
| Pro | InvoiceOnGo Pro | Trial days left; unlock the app or restore a purchase |
| 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. Each provider/address keeps its own key; "Remove saved key" deletes it |
| 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; checked restore with automatic rollback |
| Upcoming | Features in upcoming release | What's planned for the next versions (shown when there's anything announced) |
| Help & Support | Contact Support | Opens your email client, pre-filled with version/device info |
| Help & Support | Privacy Policy | Full plain-language policy, in-app |
Is InvoiceOnGo free?
You get the full app free for 3 days. After that, a one-time purchase through Google Play unlocks it for good - no subscription. Nothing you made during the trial is lost.
I sent an invoice with a mistake. How do I fix it?
Finalized invoices can't be edited. Raise a credit note for what should come off, or cancel the invoice and issue a fresh one with Duplicate as new draft. For a quotation, just edit it.
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.
What changed in each version this guide describes.
CN-2026-27-0001, with goods-returned stock).
Reverse charge on India invoices. Round off to the nearest rupee and paisa-exact totals that always add up; Indian digit grouping.
Place of supply from the client's state or GSTIN; review before finalizing; invoice date picker; drafts autosave.
GST rate table updated to the 2025 reform (0/5/18/40%).
Printed invoice: GSTIN on every template, no cut-off amounts, multi-page flow, Hindi/Indic text.
Safer backups (checked before saving, signed PDFs only) and safe restore with automatic rollback.
Stronger app lock (covers open dialogs, clock-proof lockout), certificate validity checks, one AI key per provider.
Export gains a Credit notes sheet. Settings shows Features in upcoming release.
Browse the screenshots below.
