Period & body-state tracking
Your cycle, with context.
Log the day in seconds, understand where you are now, and notice patterns without turning estimates into promises.
See how Chroma worksPrivate by design · No account required
Clarity before certainty
Facts stay facts.
Estimates stay estimates.
Chroma keeps the days you record visually distinct from dates it predicts. One usable cycle is enough to begin; confidence grows as your own history grows.
The essentials, wherever you check in.
- 01Today
- Current phase, cycle day, and the next period estimate are visible without digging through the app.
- 02Log
- Track flow, symptoms, mood, energy, sleep, and notes in a few intentional taps.
- 03Calendar & Insights
- Logged days, recent cycles, symptoms, and moods stay in the same clear context, so you can notice what repeats.
Quiet and local
Your most personal data stays close.
Chroma does not create accounts, run its own server, or include third-party analytics, advertising SDKs, or tracking SDKs. Your logs use Apple's local storage on your device.
- No account
- No ad tracking
- App lock support
Chroma's cycle and fertility-related dates are estimates only. Chroma is not a medical device and must not be used for diagnosis, treatment, or contraception.