Is there a good app for use an intermittent fasting timer?
Poorly Executed: 17 apps already serve this, and 10 data points mined from real user reviews across 2 sources 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 use an intermittent fasting timer, mined and clustered from real reviews:
| Complaint area | Type | Mentions | What a user said |
|---|---|---|---|
| interval-timer accuracy | bug | 2 | il timer non preciso, la scansione dei periodi avviene con un'anticipo di 40/45". |
| interval metronome timing | bug | 2 | un coup le metronome s'arrête apres une minute, des fois non et à un moment il ne s'arrête plus du tout |
| no auto start/stop fasting with notifications | missing-feature | 1 | missing such basic features as auto start fasting and auto stop fasting with notifications |
| interval workout timer resets | bug | 1 | me hace repetir varias veces el primer intervalo, ya casi cumplo el tiempo y se reinicia |
| between-exercise rest timer | missing-feature | 1 | Please add a separate rest timer after the completion of an exercise |
| interval workouts pause/skip and miss recorded intervals | bug | 1 | it pauses doing my workout and speeds up the interval...did not record the last two intervals |
| interval timing with feedback | missing-feature | 1 | Would love to see ability to add interval timing w/ feedback |
| changing meal times only works intermittently | bug | 1 | changing times of meals only works half of the time |
Apps that already serve this
| App | Rating | Ratings | Price |
|---|---|---|---|
| 72Hour Fasting Timer | 4.3 | 3 | $1.99 |
| Intermittent Fasting - Fasted | 5.0 | 1 | $4.99 |
| Interval Timer Pro | 4.5 | 597 | $2.99 |
| Seconds Pro Interval Timer | 4.8 | 11,909 | $7.99 |
| Zero: Fasting & Food Tracker | 4.8 | 445,285 | Free |
| Sezzy Timer | 3.9 | 100 | $1.99 |
| Meditation Timer Pro | 4.8 | 1,144 | $1.99 |
| Legends Timer | 4.0 | 4 | $4.99 |
Should you build it?
The right features exist but the execution is buggy, dated, or painful. Out-execute it. Opportunity here scores 32 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.
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