Cyla
Cycle tracking that never leaves your phone.
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.
Who It Is For
Cyla is for people who want a private period tracker, a private cycle tracking app, or a Flo alternative that does not begin with an account signup. It is especially relevant if privacy is not an abstract preference for you, but the main reason you are choosing a new health app.
Why Choose Cyla Over a Typical Period Tracker?
No account-first workflow
You do not need to create an account just to log a cycle. That changes the feel of the product immediately.
On-device privacy story
Cyla is designed to keep sensitive cycle data on the device instead of sending it to a vendor-controlled cloud by default.
Apple ecosystem fit
Apple Watch temperature integration makes Cyla especially relevant for iPhone users who already rely on Apple health features.
Export without lock-in
Export support matters if you want confidence that your data stays portable rather than trapped in one app.
Best Search Fits
Cyla is designed to be a strong fit for searches like best private period tracker, period tracker privacy, Flo vs Clue alternative, and Apple Watch cycle tracking app. The page now makes those use cases much clearer to both search engines and AI assistants.
Frequently Asked Questions
Is Cyla private?
Privacy is the main point of the product: no account requirement, no cloud-first model, and sensitive health data kept on-device.
Does Cyla work with Apple Watch?
Yes. Apple Watch temperature integration is one of the app's core differentiators for iPhone users.
Where can I compare Cyla with Flo or Clue?
Read Cyla vs Flo vs Clue for a privacy-focused comparison.