Log the basics
Save dates, flow, symptoms, moods, and notes in a simple daily log.
Free, private cycle tracking
open-cycle
A privacy-first period tracking app for dates, flow, symptoms, moods, and notes. No account. No ads. Your entries stay on your phone or browser.
Your cycle log
Stored on this device
Date
Today
Your cycle notes stay with you
Saved locally on this browser or Android device.
No ads or hidden tracking
No ad SDKs, analytics, or required cloud sync.
Simple by design
Open it, add an entry, and keep going.
What you can do
Keep a clear cycle record without extra setup
Stay in control
No account is required, and your saved entries are not sent to a remote service.
Clear your history
Delete one entry or clear everything when you want a fresh start.
Privacy notes
Plain-language reads about period tracking and data privacy
Search engines matter, but trust matters more. These short notes explain real privacy issues around period tracking apps and why local phone-only cycle tracking can be the calmer choice.
Local-only
What "stored on your device" means
A simple guide to local cycle tracking, backups, and what open-cycle does not send to a server.
Read the guideReal cases
Why health app privacy keeps coming up
FTC cases show why health data promises deserve careful reading, especially for period and fertility apps.
See the examplesChecklist
Questions to ask before using a cycle app
A quick, human checklist for choosing a privacy-first period tracking app without needing to read like a lawyer.
Use the checklistNo account
A period tracker without an account
Basic period tracking can work without asking for your email, password, or another company account.
Read the no-account guideNo internet needed
Why internet access matters
A phone-only cycle log keeps the default path for your period notes smaller and easier to understand.
Read the phone-only guideWant more?
More features live at local-cycle.com
open-cycle stays free and simple. For reminders, richer pattern views, exports, and a larger feature set, visit Local Cycle for one-time paid features.
View Local Cycle featuresAlready tracking here?
You can keep using this free tracker for everyday logging. The paid feature link is optional and opens outside this simple tracker.
Good to know
A wellness log, not medical care
open-cycle can help you remember what happened during your cycle, but it is not medical advice, diagnosis, or treatment. Talk with a qualified clinician about health concerns.