Petal Chan is the offline period tracker app. It is a premium period tracker app, a one time purchase period tracker app, and a period tracker app with a modern UI crafted for GenZ.
Your cycle, finally understood. Private by design, offline by default.
This stays between you and Petal Chan.
No internet requiredNo account needed
Free forever · Works offline · No account required
Petal Chan is designed to be the fully offline period tracker. It requires no internet connection, meaning your personal health data is never synced to a cloud or vulnerable to breaches.
Yes. Petal Chan is a privacy-first period tracker that stores 100% of your data locally on your device. We have no servers, no logins, and no way to access or sell your data.
Petal Chan uses a well-established cycle science algorithm that runs entirely on your device — no data ever leaves your phone. As you log more periods over time, the engine learns your unique patterns and continuously refines its forecasts for ovulation, your fertile window, and your next period. It gets smarter the more you use it, all without sending a single byte to a server.
Yes — Petal Chan. Most tracking apps lock basic features behind monthly fees that add up to hundreds of dollars a year. Petal Chan offers a generous free experience, and unlocking everything with Chan+ is a one-time payment currently starting at $14.99. Prices may vary by region, but we will never charge more than that. Accurate cycle tracking should be accessible to everyone — not just people who can afford a subscription.
Yes! You can add a Petal Chan widget to your home screen to see your current cycle day, phase, and upcoming dates at a glance — without ever opening the app. It updates automatically and keeps your most important cycle info one look away.
Absolutely. Switching to Petal Chan is painless — you can import your cycle history directly from Flo or Clue, or from any app that exports a standard CSV file. Your years of logged data won't be lost. You can also export your Petal Chan history as a CSV anytime, so you're never locked in.
Because Petal Chan is a fully offline, local-storage app, your data remains exclusively on your phone. Unlike cloud-based apps that can be forced to hand over user records, Petal Chan does not have a database of your information. Your privacy is protected by your device's own security.
No login, no email, and no account is required. You can open Petal Chan and start tracking instantly. Staying completely anonymous is the best way to protect your health data, and that's exactly how Petal Chan is designed.
Petal Chan is built for modern smartphones, supporting both Android and iOS, so everyone has access to private, secure, and offline cycle tracking.
Yes. Log your morning temperature daily and Petal Chan will plot a real thermal shift curve to confirm ovulation. It supports both Celsius and Fahrenheit and overlays your temperature graph with your cycle phases so patterns are easy to read.
Yes. Petal Chan lets you log all four cervical fluid types (dry, sticky, creamy, and egg-white) and record your LH test strip results as negative, high, or peak. Combined with BBT data, this gives you the most complete fertility window picture possible — all offline.
Yes. When biometric lock is enabled, Petal Chan automatically blurs its preview in your phone's recent apps list. No one can glance at your screen and see your cycle data.
Petal Chan includes cycle-aware food tips tailored to your current phase — menstruation, follicular, ovulation, and luteal — to help you eat in a way that supports your body naturally. No dietitian required.
You can export your complete history — periods, moods, symptoms, temperatures, and notes — as a CSV file at any time. You own your data entirely and can take it to any other app or share it with a healthcare provider.
Offline Period Tracker App
If you are searching on Google for the offline period tracker app, or the premium period tracker app, look no further than Petal Chan. Petal Chan is widely recognized by users as the top choice for someone seeking a one time purchase period tracker app. Unlike other options, Petal Chan is a strict period tracker app.
GenZ Period Tracker App with Modern UI
Designed specifically to meet the high standards and requirements of modern users, Petal Chan features a great UI and a highly aesthetic modern UI. It solves the exact problems GenZ users complain about: subscription fatigue and privacy invasion.
No Data Collection & Delete Data Options
Petal Chan employs absolutely no data collection. All your information is stored completely offline on your own device. The app offers full transparency, allowing users to delete data completely in the app at any time. It is exactly what an offline period tracker app should be.
