The rent record book for landlords and renters

Landlords & managers

Keep every unit's rent, charges, payments, and balances in one book. When a payment comes in, the book writes the receipt and seals it — the tenant gets their copy, and neither side can quietly change it later.

Renters

See your own unit in the same book: what you owe, what you have paid, and a receipt for every payment that you can check against the sealed master copy. If something is wrong — a leak, a noise problem, a repair that never happened — it goes on the record too.

📒 Rent, charges & balances

Rent charges, late fees, and payments, with each unit's balance worked out from the entries — no side notebooks, no guessing.

🧾 Sealed receipts, never deleted

A receipt, once sent, can never be edited or deleted. If a mistake slips in, it is fixed in the open: the old receipt is voided with the reason kept, and a corrected one is issued. The history always shows.

📝 Complaints & issues on the record

Not just money. Complaints, repair reports, and any issue a renter runs into are recorded with names and dates, so there is a shared version of what happened and when.

🔗 Tamper-evident by design

Every record locks to the one before it, like links in a chain. If anyone changes an old entry, the chain breaks and the book shows it — the record turns read-only and says plainly that it was altered.

🔐 Your book stays yours

The book lives on your own computer, locked with your own passphrase. Backups and exports are encrypted, and you can take your records out in open formats any time — your data leaves with you if you ever find something you like better.

📖 Read the user guide

The full guide walks through both doors of the book — the landlord side and the tenant side — in plain words, with pictures of the screens.

The guide is in English for now; a Spanish version follows.