Privacy & security

another.money is built so that your financial data stays yours. The short version: it lives on your device, encrypted with your password, and nothing is uploaded just to use the app.

Local-first

• No sign-up, no account, no email required to use the app.
• Your book is a single file stored on your device.
• The app works fully offline.

Encryption

• Each book is encrypted at rest with a key derived from your password using a strong, memory-hard key-derivation function (Argon2id).
• On supported devices you can unlock with biometrics (Face ID / fingerprint) instead of typing the password each time.
• Because the key comes from your password, we can't recover a lost password — there's no backdoor. Keep your password safe and keep a backup of your book.

Sharing stays end-to-end encrypted

If you turn on collaboration:

• Changes are encrypted on your device before they leave it, and only the devices that hold the book password can decrypt them.
• The sync relay stores and forwards ciphertext only — it cannot read your accounts, balances, payees, or notes.

What leaves your device

• Nothing, for a local-only book.
• For a shared book: encrypted change-data to the sync relay, plus the minimum metadata needed to route it. No analytics or tracking of your finances.

Backups

• Book file — the main backup. More → Backup & restore → Save book file… exports your whole book as a single portable file that stays encrypted exactly like the book itself: whoever holds the file still needs your password. Store it anywhere you like and restore it on any device with Open book file….
• Plain-text export — the same screen can also serialise everything to a human-readable snapshot. It is not encrypted: it's the one path that exposes your data without the password, so treat that file accordingly. (It's also the copy that would survive a forgotten password.)

Either way the file is yours alone — and a recent backup is the only way back if you lose your device.

Have a security question or want to report an issue? See the FAQ for how to get in touch.