A look inside
Clean enough to use daily, deep enough to learn from
Built in React Native and Expo, tested on real devices with 333 passing tests.
Free · Open source · Android
SoulSync keeps everything on your phone. No account. No cloud. No ads. 333 passing tests, GPL-3.0, free forever.
Android APK · GPL-3.0 · Free forever
SoulSync is GPL-3.0 source code that runs on your phone. Nobody can add a paywall, sell your patterns, or shut it down. That is the actual design.
Your entries, notes, photos, and reminders stay on the device. No sync. No backup to our servers. Nothing leaves.
Finer resolution than the usual 1-5 smiley faces. Backdate entries. Add activities, notes, and photos to any log.
Mood trend with adaptive moving average, day-of-week patterns, month-over-month, and a calendar heatmap. No paywall to see your own data.
See which activities track with better or worse mood days. With/without comparisons, not just totals.
A dedicated Insights tab that reads your trends and surfaces what the numbers actually mean. No interpretation required.
Export everything to JSON and import it back at any time. You own the data format, not a proprietary backup scheme.
Dark, Light, Cherry Blossom, Midnight Blue, Forest. All included. No premium theme tier.
A single daily reminder at a time you choose. That is it. No streaks, no engagement engineering on top.
The source is on GitHub. Fork it, audit it, run your own build. The license is the privacy guarantee.
A look inside
Built in React Native and Expo, tested on real devices with 333 passing tests.
Three articles on the decisions behind SoulSync: the Daylio comparison, the local-first architecture, and why subscriptions make bad tools.
Free. No account. No subscription. Install the APK and your first entry is logged in under a minute.