Is there a good app for log menstrual cycle?
Fully Served: 16 apps already serve this, and 6 data points mined from real user reviews show where they fall short. Good apps already cover what people want. You'd need a strong wedge.
Data refreshed September 28, 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 |
| 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 |
Apps that already serve this
| App | Rating | Ratings | Price |
|---|---|---|---|
| WomanLog Pro Calendar | 4.8 | 507 | $4.99 |
| Mommy's Log: Baby Tracker | 5.0 | 2 | $2.99 |
| MyDays X Pro | 3.8 | 42 | $2.99 |
| My Birth Journal | 5.0 | 4 | $0.99 |
| Period Tracker Period Calendar | 4.9 | 173,852 | Free |
| Clue Period & Cycle Tracker | 4.8 | 404,501 | Free |
| Lively - Period Tracker, Cycle | 4.8 | 52,328 | Free |
| iPeriod Period Tracker + | 4.1 | 2,696 | $1.99 |
Should you build it?
Good apps already cover what people want. You'd need a strong wedge. Opportunity here scores 16 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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<a href="https://speculora.com/gap/log-menstrual-cycle-89"><img src="https://speculora.com/badge/89.svg" alt="Speculora: Log menstrual cycle — Fully Served" height="28"></a>Markdown
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