Is there a good app for track sleep quality?
Prime Gap: 32 apps already serve this, and 169 data points mined from real user reviews across 2 sources show where they fall short. Heavily used and done badly — the most disruptable kind of gap.
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 track sleep quality, mined and clustered from real reviews:
| Complaint area | Type | Mentions | What a user said |
|---|---|---|---|
| inaccurate sleep tracking | reliability | 17 | The new update has completely screwed up sleep tracking. The numbers I get now are very different than before and clearly incorrect |
| sleep tracking accuracy | bug | 4 | The new Google Health app no longer tracks the Fitbits sleep accurately. |
| inaccurate sleep score | reliability | 3 | see a score of 44 given my ‘3.5 hours’ of sleep (which was actually 7.5 hours) |
| inaccurate sleep data | reliability | 3 | the data in sleep is constantly incorrect and u can’t fix it like before |
| inaccurate sleep times | reliability | 2 | Says I've gone to bed hours after actually going to bed. Then it says I've gotten up hours before I have |
| sleep score registration | bug | 1 | Sleep score fails to register |
| sleep tracking inaccurate | reliability | 1 | The sleep tracking is garbage |
| records sleep cycles when not in bed | reliability | 1 | it recorded sleep cycles when I wasn't even in bed |
| shallow insights beyond sleep quality | missing-feature | 1 | Doesn't really tell you anything execpt if you slept good |
| sleep tracking accuracy degraded | reliability | 1 | getting more inaccurate after so much updates |
| sleep accuracy regression | bug | 1 | The sleep scores are much less accurate than before |
| sleep phases not tracked | reliability | 1 | также фазы сна не фиксирует |
Apps that already serve this
| App | Rating | Ratings | Price |
|---|---|---|---|
| SleepWatch - Top Sleep Tracker | 4.7 | 328,471 | Free |
| RISE: Sleep Tracker | 4.7 | 62,785 | Free |
| AutoSleep: Watch Sleep Tracker | 4.7 | 61,438 | $8.99 |
| Sleep Cycle - Tracker & Sounds | 4.7 | 27,028 | Free |
| Sleep Cycle: Sleep Tracker | 4.3 | 216,435 | Free |
| BetterSleep: Sleep tracker | 4.4 | 396,978 | Free |
| ShutEye®: Sleep Tracker, Sound | 4.8 | 348,704 | Free |
| RingConn | 3.7 | 730 | Free |
Should you build it?
Heavily used and done badly — the most disruptable kind of gap. Opportunity here scores 98 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
4 attempts, all stale and none above 6 stars — a fully abandoned graveyard with no traction or active builder.
| Project | Status | Stars | Stack |
|---|---|---|---|
| dowells-mike/sleepsafe | stale | 6 | Kotlin |
| maxfrenzel/caffeine-alcohol-exercise-sleep | stale | 5 | Jupyter Notebook |
| pysource-com/sleeptracker | stale | 5 | Python |
| quochung-cyou/SleepTracker | stale | 4 | Java |
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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