Credit book app
Know who owes you what, without the notebook.
Baki Fast is a free credit book for small shops: write a sale on credit or a payment in seconds, send a polite WhatsApp reminder, share a PDF statement. No sign-up, no internet needed, no ads.
Free forever for the book itself. iPhone, Android and the web.
Everything the notebook did, and what it could not
Six jobs a shop does every day, each in a few taps.
Write credit and payments
Pick the customer, type the amount on the calculator keypad, done. Add items (qty × price), a note or a due date when you need them.
See every balance at once
Who owes how much, who is overdue and who paid today, for customers and suppliers alike.
Remind without the awkwardness
A polite reminder on WhatsApp or SMS with the exact amount, and a short note to the customer after each entry.
Send a statement
A clean A4 PDF statement for any period, or a 58/80 mm receipt for your thermal printer.
Keep the till
Money in and out with categories. Payments from customers go into the till by themselves; the day-end summary adds it all up.
Never lose the book
Automatic daily backup on the phone, a backup file you can keep anywhere, and a PIN or fingerprint lock.
Your book stays yours
On your phone
Records are stored on your device. No account, no e-mail, no phone number needed.
Encrypted when it travels
Cloud sync (Pro) is end-to-end encrypted: our server cannot read names or amounts.
No ads, ever
We earn from Pro, not from your data or your attention.
Free core, never locked
The book itself is free and unlimited. If Pro ends, every record stays and keeps working.
Prints with Print Fast
Have a Bluetooth thermal printer? Baki Fast sends receipts and statements to Print Fast, our printing app, as text, so they come out sharp on 58 mm and 80 mm paper.
About thermal printingBaki, the assistant that keeps the book with you (Pro)
Say "write 450 on credit for Ahmet, 2 bread 1 milk" or send a photo of a receipt. Baki prepares the entry and shows it on a card; nothing is written until you confirm.
- Asks "which Ali?" when two names match
- Tables and charts from your own records: the app does the maths
- Drafts reminders and opens statements
- Undo right after every confirmed change
Assistant requests are processed by an AI provider; the consent screen in the app says what is sent.
Made for every kind of shop
Grocers, butchers, bakeries, workshops, salons and wholesalers keep their books with Baki Fast.
Free tools, no sign-up
Useful on their own, in your browser.
GST calculator (India)
Add GST to a price or take it out of an inclusive one at 5%, 18% or 40%, with CGST and SGST.
Profit margin and markup
Find the margin and markup from cost and price, or the selling price for the margin you want.
Cash count calculator
Count the till note by note and coin by coin; see the total and whether it is over or short.
Payment reminder generator
Type a name and an amount; get a polite, firm or final reminder and open it in WhatsApp.
Inflation and old debts
See what an old debt is worth today, using an inflation rate you choose.
Account statement generator
Type a few lines and download an A4 PDF statement for your customer.
Free, with Pro when you grow
The book, reminders, statements and backups are free with no limits.
Free
Free forever
- Unlimited customers, suppliers and entries
- WhatsApp and SMS reminders
- PDF statements and thermal receipts
- Cash book and day-end summary
- Backup, export to Excel, app lock
Pro
Monthly or yearly
Start with a free trial. The price is shown in your currency in the store.
- Several books for several shops
- The Baki assistant
- Cloud: open the book on a computer and other phones
- Your logo and bank details on statements
- Due-date alerts, reminder queue, reports by date
Questions
Is Baki Fast really free?
Yes. The credit book itself, with unlimited customers and entries, reminders, statements and backups, is free with no time limit. Pro is an optional subscription for extras such as several books, the assistant and cloud sync.
Do I need an account or internet?
No. Baki Fast opens without sign-up and works offline; your records are on your phone. Internet is only used for things like sending a WhatsApp message or, with Pro, cloud sync.
Can my customer see their account?
Yes, if you want: send a PDF statement, or open a shared account so the customer sees the same account in their own Baki Fast.
What happens if I change phones?
Make a backup file in Settings and restore it on the new phone, or turn on cloud sync (Pro) and add the new phone with a QR code.
Is it accounting or invoicing software?
No. Baki Fast is a credit book for tracking what customers and suppliers owe. It does not issue invoices or e-invoices.
Can I use it on a computer?
Yes. Open it on the web in any modern browser. With Pro cloud sync, the same book opens on your phone and your computer.
Try it with your own customers
Free to download, no sign-up. Your first entry takes ten seconds.