Is there a good app for log menstrual cycle?
Poorly Executed: 10 apps already serve this, and 8 data points mined from real user reviews show where they fall short. The right features exist but the execution is buggy, dated, or painful. Out-execute it.
Data refreshed July 20, 2026 · scores recompute weekly as new reviews are mined, so re-check before you build.
What users complain about
The most common complaints behind apps that try to log menstrual cycle, mined and clustered from real reviews:
| Complaint area | Type | Mentions | What a user said |
|---|---|---|---|
| menstrual cycle data migration | bug | 1 | lost about 5 years of information including cycle tracking |
| lost menstrual tracking history | bug | 1 | Years of menstrual tracking in my Fitbit app just… gone, overnight |
| can no longer track menstrual cycle | missing-feature | 1 | Can no longer track my cycle |
| no cycle/menstrual phase syncing | missing-feature | 1 | I also wish there was a way to sync certain phases with my cycle |
| contraceptive method on sex log | missing-feature | 1 | when you select “unprotected s**” a drop down comes down where you’re able to select your contraceptive method |
| records sleep cycles when not in bed | reliability | 1 | it recorded sleep cycles when I wasn't even in bed |
| editing monthly cycle data is buggy | bug | 1 | made editing monthly cycle data awful/buggy, unintuitive, and rarely works |
| too many questions to log cycle | ux | 1 | Everytime I try to log my cycle I can’t because there are to many damn questions |
Apps that already serve this
| App | Rating | Ratings | Price |
|---|---|---|---|
| Period Tracker Period Calendar | 4.9 | 171,298 | Free |
| Clue Period & Cycle Tracker | 4.8 | 399,446 | Free |
| Lively - Period Tracker, Cycle | 4.8 | 44,212 | Free |
| iPeriod Period Tracker + | 4.1 | 2,696 | $1.99 |
| Natural Cycles Fertility App | 4.8 | 29,570 | Free |
| Flo Cycle & Period Tracker | 4.7 | 1,921,735 | Free |
| Premom-Ovulation Tracker, PCOS | 4.8 | 57,453 | Free |
| Sleep Cycle: Sleep Tracker | 4.3 | 216,435 | Free |
Should you build it?
The right features exist but the execution is buggy, dated, or painful. Out-execute it. Opportunity here scores 24 out of 100 — a function of demand, how crowded the field is, and how badly the existing apps perform. Use the live map to compare it against adjacent tasks.
Who has tried building this
| Project | Status | Stars | Stack |
|---|---|---|---|
| juniperswift/cycles | stale | 3 | |
| jmjordan/cycles | stale | 2 | Python |
Open-source projects that attempted this task — active ones show today's bar; abandoned ones are a signal to validate why earlier attempts died.
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