How to make a period tracker app for iOS
What a period tracker app needs
- A cycle log: period start and end dates, flow level, and notes
- Predictions for the next period and the fertile window, based on logged history
- Symptom and mood tracking, for example cramps, headaches, or energy
- A calendar view and simple cycle statistics
- Reminders before a predicted period or to log the day
- Private, secure storage, ideally on-device or in the user's iCloud, with optional Face ID or a passcode lock
- Optional HealthKit integration to read or write cycle data, following Apple's HealthKit rules
The most important design decision is data handling. Health data should be minimized, stored privately, and never used for advertising. If you sync to a server, secure it and disclose it clearly.
How to build it with AppFlight
Describe it in plain English, for example: "A period tracker where I log period start and end dates, flow, symptoms, and mood, see a calendar and predictions for my next period and fertile window, get a reminder before my predicted period, store everything on device with an option to lock the app with Face ID, and keep nothing on a server unless I turn on iCloud sync." AppFlight plans the screens, generates native SwiftUI, and launches it in a live simulator so you can try logging and see the prediction logic. You iterate in plain language, for example adding a discreet app icon option or a symptom trends view.
Monetization for a period tracker app
The common model is a free core tracker with a paid upgrade. Free users get logging and basic predictions; the subscription unlocks detailed insights, symptom analysis, longer history, and export. Add a RevenueCat paywall for subscriptions, and use Superwall to test paywall designs without shipping an update. Be careful not to gate information a user might rely on in a way that misleads them, and keep the value of the paid tier genuine. A few dollars a month or a yearly plan is typical for health apps.
Shipping it to the App Store
When the app is ready, AppFlight signs the build, uploads to TestFlight so you can test logging and reminders on your own device, then submits to the App Store with metadata and screenshots from the simulator. Health apps get extra scrutiny in review, so complete the App Privacy section honestly, provide a clear privacy policy, and follow Apple's rules for HealthKit if you use it. If Apple rejects the build, AppFlight reads the reason, works on the fix, and resubmits. Apple reviews every app, so a submission is not the same as an approval, and the responsibility for honest data handling is yours.
FAQ
Do I need to code to make a period tracker app?
No. You describe the app in plain English and AppFlight generates native Swift and SwiftUI. Because the app handles health data, pay extra attention to where data is stored and what you disclose in App Privacy.
How should a period tracker handle sensitive data?
Health data is sensitive, so favor storing it on the device or in the user's private iCloud rather than a shared server, minimize what you collect, and disclose it accurately in the App Privacy section. If you integrate HealthKit, you must follow Apple's rules, which forbid using health data for advertising.
How do period tracker apps make money?
A free core tracker with a subscription for detailed insights, predictions, and symptom analysis is common. A RevenueCat or Superwall paywall handles the subscription. Do not gate basic safety-relevant information behind a paywall in a way that misleads users.