RedCalendar — Cycle Tracker 12+

Women's diary and calendar

Artem Bolotov

Designed for iPhone

    • Free

iPhone Screenshots


Try our cycle tracking app: analyze and predict menstruation, ovulation, and fertile days. We're not going to suggest that you evaluate mood shifts, drink water, or analyze your steps or hours slept, but you can enter any information about every day if you want to. The app is cloud-based: you don't need to worry about backups or iCloud space. If the need arises, RedCalendar will also work in airplane mode, so you can add your data and sync it later when you're back online.

We use the median values of data you input to calculate your cycle. That's better using the average and more honest than talking about artificial intelligence. The app will adapt to you. And if you're prescribed pills to regulate an irregular cycle, enter what your new ideal cycle looks like in the settings and the app will remember them for 3 months.

We send notifications at 9:00 and only about what matters: 2 days before your cycle starts, a day after the end of menstruation (if you forgot to mark it), and 4 days before your predicted ovulation. If you go on vacation, and your time zone changes, open the app, so we know.

TAGS (Beta)
Use tags for giving additional info about the day. Just add one or more custom tags and track your workouts, emotions or new habits. Use the app every day as your personal dairy.

The app is free to use and ad-free

What’s New

Version 2.1.8

Now it’s easier to determine what day of the cycle is. Improved stability.

App Privacy

The developer, Artem Bolotov, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Linked to You

The following data may be collected and linked to your identity:

  • Health & Fitness
  • Contact Info
  • Identifiers
  • Usage Data

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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