Coinbook: Expense Tracker

Coinbook keeps your money on your phone. Not on our servers — we do not have any. There is no sign-up, no account, no ads and no trackers. Open the app and start logging.

WHY COINBOOK IS DIFFERENT
• COMPLETELY LOCAL. Every transaction, account, receipt and budget lives in a SQLCipher-encrypted database on your own device. It is not uploaded, not synced to us, and not backed up anywhere you did not choose.
• WE KEEP NOTHING. Coinbook has no servers and no user accounts, so there is nothing for us to hold. We cannot see your balance, your spending or your receipts, because none of it ever reaches us.
• NO TRACKING. No analytics, no advertising SDKs, no device fingerprinting. Nothing follows you around. Crash logs are written to your phone and stay there unless you choose to share one with us.
• NO ADS. NOT NOW, NOT LATER. Coinbook is free and stays free. You will never see an ad, a paywall, a subscription prompt, or a "premium" feature held back.
• WORKS OFFLINE. Aeroplane, train, basement — Coinbook does not need a connection, because your ledger already lives on your phone.
• CONNECT YOUR OWN AI. Coinbook has no AI costs baked into a subscription. If you want a hand, paste in your own API key from Claude, OpenAI or Gemini and the assistant will read a receipt or turn a sentence into a transaction. It talks directly from your phone to the provider you chose — never through us. It is off by default, entirely optional, and the app is complete without it.

EVERYTHING IN ONE PLACE
• Balance, income, spending and what is left to spend, on one screen
• Swipe between the figures that matter this month
• Recent activity always a glance away

BUDGETS THAT ACTUALLY HELP
• Set a monthly limit and Coinbook works out what is safe to spend today
• A ring shows how much of the month you have used
• Per-category limits when you want tighter control

BUILT FOR REAL SPENDING
• Log an expense in seconds, or record a whole shopping trip item by item
• Attach a receipt photo to any transaction
• Split one payment across several categories
• Split a bill with friends and track who owes what
• Save any transaction as a template for what you buy every week

BILLS, LOANS AND GOALS
• Track subscriptions and get reminded before they are due
• Log a payment with one tap and the due date rolls forward
• Loans and EMIs with outstanding balances and a payoff simulator
• Savings goals with progress you can watch

ACCOUNTS AND CURRENCIES
• Cash, bank and cards, each with their own payment methods
• Multiple currencies, converted to your base currency
• Separate books for personal and business, kept apart

YOURS TO KEEP
• Unlock with fingerprint or face
• Encrypted backups you control, saved where you choose
• Import a bank statement from CSV, export your transactions any time
• Delete everything with one tap, and it is genuinely gone

TAX TIME
• Flag any expense as tax deductible
• Pull a deductions report when you need it

LANGUAGES
English, Hindi, Malayalam and Tamil.

Coinbook is made in Australia by Alltechzone.