The story
Mito started as a simple frustration. Most workout apps either lock the basics behind a subscription, plaster the screen with ads, or ship a "free" tier that funnels every set, rep and resting heart-rate into a marketing pipeline.
Training is personal. Tracking it shouldn't require an account, an email confirmation, a privacy policy you don't read, or a server farm in another country quietly collecting your habits.
So Mito was built around one rule: your data lives on your device. Everything else — backup, AI assistance, location-aware suggestions — is optional, opt-in, and entirely under your control.
The principles
1. Offline first, always
The app must be fully usable on the underground, in a basement gym, on a hike. Network failures are a normal state, not an error. The core loop — start a workout, log sets, finish, review history — must never need a server.
2. No accounts, no surveillance
There is no Mito account because there is no Mito server. We do not collect your name, your email, your contacts, your location, your installed apps, your advertising ID, your usage patterns, or your training history. We do not run analytics. We do not run crash reporters. We literally cannot leak data we don't have.
3. Online features are strictly opt-in
Two online features exist: optional Google Drive backup of your own data into a hidden per-app folder you control, and an optional AI Coach that talks directly to an AI provider you configure with your own API key. Both are off by default, both can be turned off any time, and both bypass us entirely.
4. Open about what happens to data
The privacy policy is short, plain-language, and complete. It explains exactly what data exists, where it is stored, when it leaves the device, and to whom. If you can't tell from the policy whether something is collected, that's a bug — please tell us.
5. Built to last, not to subscribe
Mito is not a SaaS. There is no "ongoing service" you have to keep paying for to access your own training history. If we vanish tomorrow, the app keeps working, your data keeps existing, and you can export it as a single JSON file at any time.
Who builds it
Mito is built by Manuel Baer, an independent developer based in Switzerland, working under the name spatialsparks.
It's a one-person project, written in Flutter, deliberately small, and shaped by years of hating fitness apps. The icon is the letter M because the project is named after mitochondria — the part of the cell that turns food into the energy you train with.
Get in touch
Bug reports, feature requests, privacy questions, or just thoughts on what a fitness app shouldn't do — all welcome.
- Email: info@mitofit.ch
- Try the app: Open Testing on Google Play