Record every sale
Write down what you sold and how it was paid — full payment, on credit, or part now and part later. Ojabook works out the balance.
Offline bookkeeping
Put down the notebook. Pick up Ojabook.
Record sales and expenses in seconds, and always know who owes you. Ojabook adds everything up for you — and it works even without data.
Free · No account · Works offline
What it does
Three things, done properly
Ojabook is not trying to be an accounting office. It does the three jobs a trader actually needs every day.
Track what you spend
Put expenses in with a simple category — stock, transport, labour, feed, rent. You always see what is really left as profit.
Know who owes you
Debts are grouped by customer, named and clear. When someone pays, record it once and the oldest debt is settled first.
How it works
Three steps, every day
Write it down
Tap Add, type the item and the amount, and choose the date. It takes a few seconds, even with one hand.
See your money
The home screen adds up your sales, expenses and profit for today, this week or this month.
Collect what you are owed
Open Debts to see who owes you. When they pay, record it and the balance updates.
No network needed
Works without data
Market network comes and goes. Ojabook does not need it. Once you have opened the app one time, it keeps working with no data and no Wi-Fi — recording sales, expenses and debts exactly as normal.
Everything is added up on your phone itself, so the app stays quick and does not wait on a network that may not be there.
Private by default
Your records stay on your phone
There is no account and no cloud. Your sales, expenses and debts are saved on your own device — not on a server we can read. We never see your customers or your numbers.
The trade-off is honest: if you clear your browser data or lose the phone, the records are gone. That is why Ojabook lets you download a backup whenever you like.
Get it on your home screen
How to install on Android
Installing puts Ojabook on your home screen so it opens like a normal app, full screen and offline.
- Open this page in Chrome on your Android phone.
- If a small bar says “Add Ojabook to Home screen”, tap it.
- Otherwise tap the three-dot menu (⋮) at the top right of Chrome.
- Tap Add to Home screen, then Install.
- Confirm — the Ojabook icon now appears with your other apps.
On iPhone, open this page in Safari, tap the Share button, then choose “Add to Home Screen”.
Questions
Straight answers
Will I lose my records if I lose my phone?
Yes, unless you have a backup. There is no cloud copy yet — records live only on this phone. Open History and tap “Download backup” now and then, then keep that file somewhere safe like your email or a memory card.
Do I need an account or internet?
No account, no sign-in and no internet. Ojabook works fully offline once it has opened the first time.
Can I move my records to a new phone?
Yes. On the old phone use History → Download backup (JSON). On the new phone open History → Restore from backup and choose that file.
Is Ojabook free?
Yes, it is free to use. There is no payment and nothing to subscribe to.
Can I see the numbers as a spreadsheet?
Yes. History → Download CSV gives you a file you can open in Excel or Google Sheets.