Clue Period Tracker & Calendar ($40/year)
The Clue Period Tracker helps you better understand your cycle; the more you log, the better read the technology will have on your body. Not only does it help you analyze changes in your flow, feelings, and sex drive, it allows you to log your birth control method, set up calendar reminders, and you can sync your period data with Apple Health. If you're trying to get pregnant, dealing with menopause, or closely following your ovulation, the app is there to support.
Another editor favorite is Flo ($40/year), which functions similarly with a slightly different interface.
Editor quote: "I have become very dependent on my Clue period tracking app. I mostly use prescription pharmaceuticals to combat my menstrual cycle symptoms, including migraines, but the app has helped me notice patterns with my emotions and my pain, so I can get ahead of the most challenging symptoms." — Nancy Einhart, head of content, PS
