Cycle data is some of the most sensitive data a phone collects. sCycle is built so that, by default, nobody — including us — ever sees it.
§ 01What it is
sCycle is a period- and cycle-tracking app whose home is an encrypted local database. Predictions run on-device. Logging is optional and skippable. You can use the entire app without ever entering an email.
§ 02What it does
Track flow, mood, and symptoms as granularly or loosely as you want. Get cycle predictions from a small, on-device model. Lock the app behind biometrics if you share a phone. Export your entire history to CSV, or wipe it, anytime.
Cycle data on someone else’s server is a liability. sCycle keeps it on yours, encrypted, and asks for nothing in return.
§ 03What it won’t do
No community. No articles. No shop for vitamins. No partnerships with health platforms. No “share your data for research” prompts. No ads targeted on what someone might infer about your cycle.
No partner sharing, no real-time co-tracking, no social layer. If you turn on Sapplify Sync (optional, separate subscription, arriving June 8, 2026) it copies your encrypted log to your other devices — and only your devices.
§ 04Who it’s for
Anyone who tracks their cycle. Anyone who used to track their cycle and stopped because the app they used got acquired, or added a social feed, or started asking them to upgrade. Anyone who wants the feature without the politics.
