Period Tracker and Calendar
SimpleInnovation
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4.9
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About This App

  • Category

    Health & Fitness

  • Installs

    10M+

  • Content Rating

    Everyone

  • Developer Email

    feedback@period-tracker.com

  • Privacy Policy

    https://www.simpleinnovation.us/my-calendar/privacy-policy

Screenshots
Editor Reviews

Period Tracker and Calendar by SimpleInnovation is essentially a straightforward app for monitoring menstrual cycles and predicting future periods. It first launched in 2018 and is available on both the Google Play Store and the Apple App Store. On Google Play alone, it has racked up over 10 million installs, which is pretty impressive for a niche utility. The best part is that the app is completely free to download and use. You don't need to register or create an account to start tracking, which is a huge plus for privacy-conscious folks. There are in-app ads, but they are not intrusive, and you can purchase a premium subscription to remove them and unlock a few extra features.

Using this app is as simple as it gets. You just open it, tap on today's date, and log whether your period started or ended. The app then uses that data to calculate your average cycle length and predict your next period, fertile window, and ovulation days. One tip I picked up is to log at least three months of data before relying on its predictions, as the algorithm needs a baseline to be accurate. You can also set reminders for pill intake or upcoming periods, which I find super handy. Unlike some bloated apps, this one doesn't overwhelm you with dozens of input fields; it sticks to the essentials like flow intensity, symptoms, and mood.

I switched to Period Tracker and Calendar from Clue because Clue started feeling too clinical and data-heavy. With this SimpleInnovation app, I don't feel like I'm managing a spreadsheet; I'm just quickly noting what I need. Another similar app is Flo, but Flo bombards you with health articles and community forums, which is not what I want when I'm just trying to check my cycle length. This app feels more like a digital diary for your body, without the noise. I chose it over others because it's lightweight, respects my privacy by not requiring an account, and does exactly what it promises: track my period without any fuss.

Features

  • ✏️ One standout feature is the custom note system. You can write down specific notes for each day, like mild cramps or a headache, and the app lets you color-code them. This makes it super easy to scroll back through months of data and spot patterns at a glance. In contrast, Clue locks certain notes behind a paywall, which feels restrictive.
  • 📅 The calendar view is incredibly clean. You see the whole month at once with dots and shaded areas indicating your period and predicted fertile window. It doesn't clutter the screen with ads or pop-up tips like Flo does. I can literally open the app, see my next period date within two seconds, and close it.
  • 🔔 The reminder system is flexible. You can set multiple reminders for pill alarms, upcoming periods, or even ovulation windows. The notifications are simple and don't nag you. Compared to Eve by Glow, which sends push notifications that feel like spam, this app respects your attention.
  • 📊 The prediction accuracy improves noticeably over time. After logging six cycles, the app rarely misses the mark by more than a day. Other apps like Period Calendar Tracker often require constant manual adjustments, but this one learns from your input naturally.

Pros

  • ✅ No account required. Unlike Flo, which practically forces you to create a profile, SimpleInnovation's app lets you stay anonymous. This is a major plus for data privacy.
  • ✅ Lightweight and fast. The APK on Google Play is tiny, so it doesn't hog storage or drain battery life, unlike the bloated Eve app.
  • ✅ Intuitive design. Everything is where you expect it to be. There's no learning curve, which is more than I can say for Clue's menu layout.

Cons

  • ❌ No dark mode. The bright white interface strains my eyes when I open the app in bed at night. Clue offers a dark theme, so this feels like a missed opportunity.
  • ❌ Limited customization. You cannot rename cycle phases or add custom symptoms beyond the preset options, whereas Flo lets you tailor everything.
  • ❌ No cloud backup. If you uninstall the app on Google Play, your data is gone unless you manually export it. Competing apps like Ovia automatically save to a cloud account.

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