BillZap
The signal drops mid-bill
A cloud app freezes the moment the network does. BillZap keeps every invoice, customer and product on the phone itself, so the basement shop and the village market work the same as a fibre line.
Free forever · No sign-up
GST bills in 30 seconds, even with no signal.
BillZap is a free GST billing app built for Indian shops. Make a proper tax invoice at the counter, put a UPI QR on it so the customer pays before they leave, and send it on WhatsApp — all without internet.
- Works offline
- Data stays on your phone
- No subscription
- 12 Indian languages
Bill made in 28s
Paid by UPI
0 bars of signal
30sTo a finished GST bill
100%Works without internet
12Indian languages
₹0Forever. No trial, no tier
Built for the counter
Most billing apps were not made for a shop.
They ask you to sign up, then to subscribe, then to be online. Meanwhile there is a customer standing in front of you holding cash. BillZap is built the other way round.
The free plan runs out
Twenty invoices, then a paywall. BillZap has no invoice limit, no trial clock and no paid tier — the app you install is the whole app.
The tax split goes wrong
CGST and SGST for your own state, IGST for another. BillZap reads it from your place of supply and says which one it is picking, on the bill screen, before you save.
Everything included
One app, the whole shop.
Billing, customers, stock, expenses and the numbers your accountant asks for — without paying for a single add-on.
GST invoices that hold up
HSN codes, per-item GST rates, CGST/SGST/IGST worked out for you, and your GSTIN on every bill.
UPI QR on every bill
The customer scans and pays before leaving the shop. No card machine, no "I'll transfer it tonight".
Bill by speaking
Say the item and the amount in your own language and the invoice fills itself in. Hands stay on the goods.
Clean PDF, straight to WhatsApp
A proper tax invoice with your shop's name on it, shared in two taps — with a real ₹ symbol, not "Rs."
Reports your accountant wants
Monthly revenue, GST summary for GSTR-1, profit and loss, and who still owes you — as PDF or CSV.
Catalogue and stock
Save what you sell once, then pick it. Low-stock and out-of-stock warnings sit on the home screen.
Day close
End the day with cash in, UPI in, expenses out and what the drawer should hold — in one screen.
Customers and dues
Every buyer's history and outstanding balance, with the oldest unpaid bills listed first so you know who to call.
Locked and backed up
PIN or fingerprint on the app, and a backup file you own — restore it on a new phone in a minute.
Three steps
From install to first bill in a minute.
Put in your shop
Name, GSTIN and UPI ID. That is the setup — it takes about a minute and every bill you send afterwards carries it.
Make the bill
Pick the customer, add what they bought. GST is applied per item and the total climbs as you go.
Get paid
Show the UPI QR, or send the PDF on WhatsApp. Mark it paid and it lands in your reports.
Billing
A tax invoice you would be happy to hand over.
The bill is laid out like a document, not a database screen: your shop at the top, the buyer's GSTIN, every line with its HSN code and rate, and the tax split spelled out underneath.
- Per-item GST — 0%, 5%, 12%, 18%, 28% and 40%
- Place of supply decides CGST + SGST against IGST
- Discounts and delivery charges, applied before tax
- Your bank details and UPI QR printed on the bill
Getting paid
Know exactly who still owes you.
Every bill is colour-coded the moment its due date passes. The ledger sorts by what is most overdue, so the call you make is the one worth making.
- Paid, sent, pending and overdue at a glance
- Ageing buckets — 0–30, 31–60, 61–90, 90+ days
- A WhatsApp reminder with the UPI link attached
- Search by customer, number or amount
Numbers
What you earned, what you owe, what is left.
Revenue by month, GST collected split into CGST, SGST and IGST, and profit after expenses. Export any of it as a clean PDF or a CSV your accountant can open.
- Month-by-month GST breakdown for GSTR-1
- Profit and loss on a cash basis
- Your biggest customers, ranked
- Indian digit grouping — ₹12,34,567, never ₹1,234,567
Compliance
GST handled properly, not approximately.
Getting the tax wrong means reissuing the bill. BillZap does the parts that are easy to get wrong, and shows its working.
The right tax, automatically
Same state as your shop and it charges CGST + SGST. Different state and it switches to IGST. The invoice screen tells you which one it has chosen and why, so a wrong place of supply cannot slip past you.
Ready for GSTR-1
A month-by-month summary of taxable value, CGST, SGST and IGST, exportable as PDF or CSV. It is supporting data for your filing, laid out the way your accountant reads it.
HSN and SAC on every line
Save the code once against the item in your catalogue and it prints on every bill that includes it, with the GST rate suggested from the item name.
Print or share
Send the PDF on WhatsApp, or print to a WiFi or Bluetooth printer from the same screen. The rupee symbol renders correctly in both.
Your language
The whole app, in the language you think in.
Not just the menus — the voice billing understands them too.
- English
- हिन्दी Hindi
- தமிழ் Tamil
- తెలుగు Telugu
- ಕನ್ನಡ Kannada
- മലയാളം Malayalam
- मराठी Marathi
- ગુજરાતી Gujarati
- বাংলা Bengali
- ਪੰਜਾਬੀ Punjabi
- ଓଡ଼ିଆ Odia
- اردو Urdu
Side by side
What you usually get, and what you get here.
| What matters at the counter | Typical billing app | BillZap |
|---|---|---|
| Works with no internet | Needs a connection | Fully offline |
| Invoices per month | Capped on the free plan | Unlimited |
| Cost | Free trial, then monthly | Free, with no paid tier |
| Sign-up required | Account and phone number | None — open and bill |
| Where your data lives | On someone else's server | On your phone |
| Voice billing | Rare, usually English only | 12 Indian languages |
| UPI QR on the invoice | Often a paid add-on | Included |
| GSTR-1 summary export | Usually a higher plan | Included |
Privacy
Your books are nobody else's business.
BillZap has no account, no server and no analytics on your invoices. What you bill stays in the app's own storage on your phone. There is nothing for us to read, sell or lose, because nothing is sent anywhere.
- No sign-up, no phone number, no email
- Invoices never leave the device unless you share them
- App lock with a PIN or your fingerprint
- Your own backup file, restorable on a new phone
Questions
The things people ask first.
Is BillZap really free?
Yes. There is no paid tier, no trial that expires and no cap on how many invoices you can make. The app you install is the whole app.
Does it work without internet?
Completely. Every invoice, customer, product and expense is stored on the phone itself. You can bill all day with the network off and nothing is queued up waiting to sync.
Are the invoices GST compliant?
They carry your GSTIN, the buyer's GSTIN, HSN or SAC codes per line, the GST rate on each item, and the tax split shown separately as CGST and SGST or as IGST. Place of supply decides which split applies, and the app tells you which one it has picked before you save.
Do I need to create an account?
No. There is no sign-up, no phone number and no email. Open the app and start billing. Because there is no account there is also no server holding your books.
Can I send the bill on WhatsApp?
Yes — the invoice becomes a clean PDF with your shop's name on it, shared in two taps. If the bill is unpaid the message includes a UPI payment link as well.
How does the UPI QR work?
Put your UPI ID in settings once. Every unpaid invoice then carries a QR code the customer scans with any UPI app to pay you directly. The money goes straight to your bank; BillZap is not in the middle of the payment.
What is voice billing?
Speak the item and the amount in your own language and the invoice fills itself in, so your hands can stay on the goods. It understands all twelve of the languages the app is translated into.
Can my accountant get what they need?
Yes. Export a month-by-month GST summary laid out for GSTR-1, a profit and loss statement, a revenue report and an invoice status report — as PDF, or as CSV they can open in a spreadsheet.
What happens if I change phones?
Take a backup from settings — it is a single file you keep — and restore it on the new phone. Your invoices, customers, products and expenses come back.
Which Android versions are supported?
Android 7.0 (Nougat) and above. The download is about 32 MB — one file that installs on any Android phone, so there is nothing to choose between.
Start billing in the next five minutes.
Free to download, free to use, and it keeps working when the network does not. No account, no card, no trial running out.
Android 7.0 and above · about 32 MB · works offline from the first launch