No. There's no sign-up, email, or password. Tally Stick generates a 24-word recovery phrase on first use — that phrase is your whole identity.

No. Everything is encrypted on your device before it's sent. The sync server only ever sees opaque ciphertext, so we — and anyone who runs a server — cannot read your expenses.

There is no reset. Because we hold no keys and no account, nobody can recover your data for you. If you lose every device and haven't written the phrase down, the data is gone. Write the phrase down and keep it safe.

Yes. Tally Stick is free to use. It's part of an open-source suite you can inspect or self-host.

Yes — the apps, the shared encryption core, and the server are all public, in one repository. You can read exactly how the cryptography works, or run your own server.

Source on Codeberg

Yes. The server is a single small binary, published as the Docker image darktrees/blind-sync with a ready-made compose file in the repository. Point the app at your own server URL and your ciphertext syncs through infrastructure you control.

Server image on Docker Hub · Source on Codeberg

Yes. It's a Progressive Web App with a local encrypted cache. It works without a connection and syncs when you're back online.

Scan a setup QR code from a device you already have (or type the 24 words) and the new device pulls your encrypted keystore — the same expense groups appear everywhere. Every device stays live in sync, and one that's been offline automatically catches up the moment it reconnects, so they all end up showing the same thing.

Each shared space has owners and members. Whoever creates an expense group is its owner; they can invite others (a QR code or invite carries just that one space's key), hand co-ownership to someone they trust, or remove a member. An owner can also step down. Ownership is checked cryptographically by the server — which still can't read anything you store.

The space's key is immediately rotated and re-shared to everyone who remains, so the person you removed can't read anything added afterwards. What they already saw while they were in the space isn't clawed back — so removal cuts off future access rather than erasing the past.

The Mycelium is the suite Tally Stick belongs to — five apps built on the same account-free, end-to-end encrypted foundation, plus one app of the same name that holds all of them at once. It's named for the fungal network that links separate trees underground and lets them share: decentralised, invisible, no central authority — and the trees stay separate trees.

Yes — that's The Mycelium (themycelium.au). One icon, one recovery phrase, every domain in one list. It isn't a replacement: the standalone apps and The Mycelium share the same keystore, so you can have both installed on the same identity at once and both work.

No. There is no migration and nothing to export. Your identity has always held one keystore covering every app; a single-app build just filters the rest out. Install The Mycelium, restore with your recovery phrase, and everything you already had appears. Uninstall the individual apps whenever you like — or never.

Each group has its own currency, chosen when you create it.

Tally Stick nets everyone out and finds a minimal set of payments to settle the group, so you make as few transfers as possible.