German slang for money. Literally: mice.
Say what you spent. That's it.
Mäuse is an expense tracker for couples with a built-in voice mode — just speak your expense and it's logged. No cloud, no account, no tracking. Everything stays on your phone.
Add expenses in seconds with a streamlined form. Amount, description, date — done.
Split by percentage or fixed amount. Preset chips for 50%, 30%, 70%, or 100%.
Speak your expense, review the AI draft, save. The only feature that connects to the cloud — uses your own OpenAI API key for transcription.
See combined totals and your partner's share at a glance, month by month.
Type it in or use voice mode — just speak what you paid for
By percentage or a fixed amount
See what your partner owes at a glance
Mäuse runs entirely on your device. Your expenses never leave your phone — there's no server, no database, no sign-up. It's just code.
Mäuse is fully open source. No build step, no bundler, no framework — just vanilla HTML, CSS, and JavaScript you can read and verify yourself.
Four files. No dependencies. No magic. Clone it, serve it, and it works.
index.html · style.css · app.js · voice-utils.js
Mäuse is a Progressive Web App optimized for iPhone. Install it from Safari and it runs like a native app — full screen, fast, and offline-ready.