Ownbook — the universal ledger for your business.

Keep the books of your shop, workshop or activity in under a minute a day.
Built for merchants everywhere: simple, fast, and your data stays with you.

■ SALES & PURCHASES
• Cash or credit sales, supplier purchases, cash, card, mobile money…
• Customers & suppliers: who owes you what, and what you owe whom
• Product/service catalog: fast entry — the app remembers your prices and learns your habits
• 234 countries and territories, currency never forced: 153 currencies + major
cryptocurrencies (BTC, ETH, USDT…), or type your own freely
• Foreign currencies with per-customer/supplier exchange rates

■ LOANS & INSTALMENT PLANS
• Loans and borrowings with tracked repayments
• Instalment payments and annuity loans, with or without interest
• Early settlement: remaining principal + interest saved calculated
• Pre-written WhatsApp/SMS reminders to your customer
• Printable, signable payment schedule (paper contract)

■ CASH & JOURNAL
• Multiple accounts: cash, wallet, bank, mobile money…
• Real-time cash position, per activity or all combined
• Complete journal with filters and a movement calendar
• Printable monthly statement (PDF) with signature

■ PROFESSIONAL EXPORT
• Excel (.xlsx) and CSV export of journal, contacts and schedules
• Combined filters: period, customer/supplier, operation type,
workspace (all activities in one file)
• Guaranteed to open in Excel, LibreOffice and Google Sheets

■ BANK-GRADE SECURITY
• PIN code (4-8 digits) + auto-lock
• Fingerprint on supported devices
• Data encrypted with AES-256 on the device
• Backup encrypted with a passphrase (.ownbookbak file)
• Optional "zero-knowledge" e-mail cloud account: the server cannot read
any of your data
• Delete your account in 2 taps, anytime

■ MULTI-BUSINESS & MULTI-LANGUAGE
• Separate workspaces: shop, jobs, staff… with a consolidated overview
• Français, English, العربية, Español, Português, Italiano, Deutsch

■ FREE, NO SIGN-UP REQUIRED
Every feature works offline, without an account, for free (including during
the 30-day trial). Ads are displayed (Google AdMob). Ad-free Premium
optional: monthly, yearly (2 months free) or one-time lifetime purchase,
via Google Play. Sign-in optional: Google or a simple local account —
never required.

■ EVERYTHING LOCAL
Your data stays on your device. No server needed, no sign-up. The cloud
account is optional, to restore your data on a new phone.

Download Ownbook and take back control of your numbers.