Period tracker · Free
Log your period in seconds, see when your next one is likely, and keep a gentle diary of how you feel — with your data kept on your own device.
Everything you need to understand your cycle — and nothing you don't.
See your predicted next period and current cycle day at a glance. Predictions start with the cycle length you set, then sharpen automatically as you log more cycles.
A calm calendar shows your logged days, your predicted period and an estimated fertile window — colour-coded so a glance tells you where you are.
Note how each day felt with a simple mood and a private journal entry, then look back over time and notice your own patterns.
A small library of clear, supportive articles — easing cramps, understanding your cycle phases, riding out PMS, and knowing when something's worth raising with a doctor.
An optional nudge a couple of days before your period is likely — and a quiet daily prompt for your diary, if you want it.
Your cycle and diary data stay on your device — we never upload it. Add an optional fingerprint or passcode lock, and export a backup so a new phone never means starting over.
Senuna Cycle is free and supported by ads. Your cycle stays yours.
Get it onGoogle PlaySenuna Cycle is for tracking and awareness only. The fertile window is an estimate — it is not a method of contraception, and the app does not diagnose or treat any medical condition. If anything about your cycle worries you, please speak to a healthcare professional.