CycleBox: Private Cycle
On-device period tracking — your cycle stays on your iPhone, never on a server.
CycleBox is built on one rule: your cycle data never leaves your iPhone. Where most trackers quietly upload your period dates, flow, and symptoms to an account they own, CycleBox stores everything locally and predicts your next cycle from your own logged history alone. No sign-up, no synced profile, no server copy of your most personal health record — just an accurate, private cycle calendar that works the moment you open it.
How It Works
A short, plain-language walkthrough of what the app does and what your first session looks like, so visitors arriving with zero context grasp the value before deciding to download.
Skim the steps below to see how the app fits into your routine, then tap through to the App Store when you're ready to give it a try.
Why People Install It
- Unlike cloud trackers that store your cycle on their servers, every entry stays on-device, with nothing uploaded to sync or share.
- Projects your next period from your own logged history while the core record stays offline.
- Works as a straightforward private period calendar instead of a social wellness platform.
Free
Log every period day, flow level, and symptom on a clean month calendar, browse your complete cycle history, and see your next period projected from past entries — all with zero sign-in and nothing stored in the cloud.
Paid
A CycleBox Pro subscription (monthly or yearly) layers on the advanced planning and forecasting tools for anyone who wants to look further ahead than the free private log, while keeping the same fully on-device, no-account foundation.
CycleBox offers Pro with monthly and yearly subscription options. Pricing is shown in-app before purchase. Subscription options auto-renew unless cancelled in Apple Settings → Subscriptions.
Privacy
CycleBox: Private Cycle explains what stays on-device and what is sent to its backend in the privacy policy. If you use AI or online features, relevant content is sent only as needed to power those features. Full privacy policy.