Cycle Streak

A private period tracker with no accounts or cloud sync.

Build a streak with quick daily logs and discover your unique cycle patterns.

All data stays securely on your device.

Cycle Streak is a private period tracker that lives entirely on your device, no accounts or cloud sync needed. With simple daily logging, you can quietly and accurately understand your body's unique patterns without complex setups.

Why Cycle Streak?

Quick Daily Logging

Easily record your period, mood, symptoms, and a short memo all on one screen. No complicated questionnaires or lengthy surveys – just the essential information you need.

Build a Habit with Streaks

As you log daily, your progress is shown as a streak. See your current streak and whether you've logged today right on the home screen, helping you build a consistent tracking habit naturally.

Calendar & Predictions at a Glance

Quickly view past period dates on the calendar and see predicted start dates based on your entries. Please note that predictions are for reference only and should not be used for contraception or medical decisions.

Earn Badges as You Track

Unlock badges for milestones like your first log, 7-day streak, 30-day streak, completing your first cycle, and more. Small achievements motivate consistent tracking.

Your Data Stays on Your Device

Cycle Streak requires no sign-ups, logins, or cloud synchronization. All your period data is stored exclusively on your device and is never sent to external servers or shared. The app is offered for free with banner, interstitial, and rewarded ads from Google AdMob; the ad network does not access your period records.

Key Features

- Near one-tap daily logging (period, flow, mood, symptoms, memo)

- Home screen showing your streak and today's logging status

- Calendar displaying past periods and next predicted start dates

- Summary of total logs, current streak, and average cycle length

- 6 types of badges to encourage consistent tracking

- Customizable settings for default cycle length

- Supports Korean, English, and Japanese

- Period data stored only on your device, no account needed (internet connection required for ads)

Recommended for those who:

- Want to track their period and mood changes simply yet consistently

- Prefer to keep personal health data off external servers or ad networks

- Aim to build a daily logging habit

Health Information Disclaimer

Cycle Streak is a personal tracking tool, not a medical device, and does not diagnose diseases or provide medical advice. Cycle lengths and predicted start dates calculated by the app are reference estimates based solely on user input and may be inaccurate. For contraception, pregnancy planning, or any other medical decisions, please consult a qualified healthcare professional.

Start with a quick log today. Cycle Streak quietly helps you keep track of your rhythm.