Debt Book

Track money you lend or borrow with a private debt and IOU tracker for iPhone.

Know who owes what at a glance. Track money lent or borrowed, automatic interest, and every payment — privately on your iPhone.

We all lend and borrow — a friend short on cash, a family medical bill, a shopkeeper's running tab. Debt Book replaces the notebook (khata) and the memory with one clear, private ledger. You record who owes what, the app tracks interest and payments, and you always know exactly where things stand.

Track money lent to friends or relatives without the awkward "did you pay me back?" conversation.

Replace the paper khata / udhar book. Keep customer credit organized per person, per book.

Track client advances and partial payments across projects, with interest if you charge it.

Split rent and bills, or run a separate ledger for business loans — kept apart from personal.

Four core ideas power Debt Book — each one designed to remove a specific headache of tracking money by hand.

Set a simple or compound rate — daily, weekly, monthly, or yearly — and Debt Book recalculates the accrued interest automatically every time a payment comes in.

Create unlimited books to split personal, family, and business ledgers. Each book keeps its own people, transactions, and totals — nothing gets mixed up.

Search across people, transactions, and books at once. Filter by date range to pull up exactly the record you need in seconds.

Everything is stored on your device using SwiftData — the