Period Tracker Guides
Short, practical guides to help you understand your dates and track your cycle with confidence.
How to Track Your Period Online Without an App
A simple way to track your period in a web browser: what to write down each cycle, how to count your cycle length and when your notes help at a doctor's visit.
When Will My Next Period Start?
How to work out when your next period will start, with a worked example, why periods come early or late and when a late period is worth checking.
How to Track Irregular Periods
How to keep track of periods that don't follow a set pattern: what counts as irregular, how to find your average and range and when to see a doctor.
Your First Period: What to Expect and How to Track It
What a first period is usually like, why early cycles are often irregular, how to keep track and when to talk to a doctor. Written for teens and parents.
How Our Period Predictions Work
What each date in Period Tracker means, why your predictions get closer to your real pattern as you log and why every date is an estimate.