sCycle - Period Tracker

Your cycle, on your phone. Logged in an encrypted database, with predictions that run on-device. No account needed to start, no ads ever, and nothing leaves your phone.

Most period apps want your cycle data. sCycle is built so nobody - including us - ever sees it.

Everything you log stays in an encrypted database on your phone. There's no email field when you open the app, and no account to create. Your most private data never has to leave the device.

Track as much or as little as you want. Flow, pain, mood, a quick note - tap what matters, skip the rest. Nothing is ever required. The calendar fills in as you go, color-coded so your period, your fertile window, and what's coming next are all there at a glance.

The predictions get sharper the more you log: your next period, your ovulation day, your fertile window - worked out right on your phone. No cloud. No machine-learning servers. The math happens on the device and stays there.

Make it yours. Three visual styles, full dark mode, and an optional biometric lock for when you share your phone.

sCycle works completely offline, forever. If you ever want your log on a second device, Sapplify Sync is there - optional, off by default, yours to switch on. It copies your encrypted log to your devices, and nowhere else.

And when you want your data out, one tap exports everything to CSV - for your own records, or to bring to your doctor. A couple more taps wipe it for good.

What you won't find: ads, a social feed, data sales, or a single "share your cycle for research" prompt. The core app is free. Pro is a one-time purchase - no subscription - and you can try it free for 7 days.

Your cycle. Your phone. Yours.