Best Free Period Tracker Online in 2026 — No App, No Sign-up
What the Tracker Does
Cycle Tracker logs your period start and end dates, calculates your average cycle length, shows your cycle phase today, predicts your next period and ovulation window, and highlights irregular cycles. All data is stored locally in your browser.
Privacy: Why Browser-Based Tracking Matters
Period tracking apps have faced significant privacy scrutiny — several sold user data to third parties. Browser-based tools that store data locally never transmit your reproductive health data to any server. For sensitive health data, local storage is the safest approach.
What to Log for Maximum Usefulness
At minimum, log period start date. Better: also log end date and flow intensity. Best: log symptoms (cramping, mood, energy) and any spotting. Even basic logging creates the dataset needed to identify patterns and support medical appointments.
Frequently Asked Questions
Track your period now
Open Cycle Tracker — no account, no app, just log your dates and see your cycle pattern.
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