HeySis: Cycle & Period Tracker
HeySis is a period and cycle tracker that feels less like an app and more like texting an older sister who remembers your cycle, your mood, and how you actually feel.
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HeySis is a period and cycle tracker designed to feel like texting an older sister. Instead of a long form, a daily check-in asks how you are, and Mia, an AI companion that knows where you are in your cycle, explains moods, PMS and body changes in plain words, with reassurance when something is normal and a nudge to see a doctor when it deserves a look. Under that sits the usual tracking: period start and length, cycle history, regularity and predictions.
Data is stored on the device, and the developer says it is moving toward end-to-end encryption, with no ads and no data sales. An AI companion can explain, but it is not a clinician. It suits young women who find clinical trackers cold and want a friendlier way to understand their cycle.
4.5
4.5 average · 56 ratings
Where it stands in the census
#23Health & Fitness
ahead of 45 appstop 34%
3views
1store taps
0taps this week
2026-08-23
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