private expense tracking,
by default.

Every major expense tracker syncs your data to a server. Mint did it. YNAB does it. Monarch and Copilot do it. The pitch is always the same — "your data, accessible everywhere" — and the trade is always the same: the most revealing dataset you own gets a permanent home on someone else's machine.

Mizan refuses the trade. Your spending log is a SQLite file in the app's private sandbox on your phone. We don't have a copy. There is nothing on a server because there is no server. If you uninstall the app, the data is gone — same as a paper notebook thrown in the bin.

The optional AI assistant is the only thing in the app that touches the network, and only when you actively use it. When you ask the assistant a question, a summary of your recent expenses (last 30 / 90-day totals, top categories, last 15 entries) goes in HTTPS to the provider you chose, using the API key you supplied. That provider's privacy policy governs what happens next — read it before you configure them. The Mizan app, the Mizan developer, and any Mizan infrastructure does not see, log, store, or process that traffic in any form.

If you don't configure an AI provider, Mizan makes zero outbound network requests. You can verify this with any network monitor or by running the app in airplane mode — the chat and voice-entry features will simply stay disabled.