Health
Cyla
Cycle tracking that never leaves your phone.
Coming soon to the App Store
On-deviceAll data stays local
Apple WatchTemperature integration
No accountNo sign-up required
What It Does
Cycle Predictions
Period and cycle predictions calculated entirely on-device using your logged history. No cloud processing.
Apple Watch Temperature
Reads wrist temperature data via HealthKit to help confirm ovulation and improve prediction accuracy.
Daily Symptom Logging
Log symptoms, moods, and notes each day. Everything stored locally, encrypted by iOS.
Fertility Tracking
Fertility window estimates based on your cycle data and temperature trends. Available in premium.
Data Export
Export all your data as JSON anytime. Your data is yours — take it with you if you leave.
No Account Required
No email, no sign-up, no cloud sync. Open the app and start tracking immediately.
Privacy & Data
- All health data stored locally with iOS encryption.
- No accounts, no cloud, no servers.
- Apple Watch data via HealthKit — on-device only.
- Nothing to subpoena, nothing to breach, nothing to sell.