Is there a good app for change video speed for slow-mo or timelapse?
Prime Gap: 13 apps already serve this, and 41 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 change video speed for slow-mo or timelapse, mined and clustered from real reviews:
| Complaint area | Type | Mentions | What a user said |
|---|---|---|---|
| video duration too short | missing-feature | 2 | لازم تطويل المدة الفديوهات |
| video playback speed control | missing-feature | 1 | Can't change video speed |
| no video playback speed control | missing-feature | 1 | please add a way to speed up the videos like in YouTube or Instagram |
| velocity changes video length | missing-feature | 1 | i use the velocity/slow motion feature, it makes my video longer or shorter. i wish i could still use the graph and have the same time |
| slow on long videos | performance | 1 | It’s too slow when I do long vids |
| no slow motion | missing-feature | 1 | there's no slow motion |
| add 60fps option | performance | 1 | 可以添加一个60帧的功能吗 |
| no custom speed curve between keyframes, only presets | missing-feature | 1 | I wish we could customize the speed curve between keyframes not just using the presets |
| smooth slow mo and motion blur now paywalled | price | 1 | y’all made smooth slow mo and motion blur pro |
| no video playback speed control (1.5x/2x) | missing-feature | 1 | if only I could watch the videos in 1.5x or 2x. My ADHD is suffering |
| speed-up affects voice pitch instead of video speed | missing-feature | 1 | if you want it sped up... It speeds up your voice, not the video |
| video exports capped at 30fps despite 60fps editing | missing-feature | 1 | Calidad de video por mas alto se guarda a 30 fps aunque se vea a 60 mientras se edita |
Apps that already serve this
| App | Rating | Ratings | Price |
|---|---|---|---|
| Amazing Slow Downer | 3.9 | 447 | $14.99 |
| Slow Shutter Cam | 4.6 | 2,775 | $2.99 |
| Vidimote for Safari | 4.1 | 57 | $2.99 |
| Grooves: Song Speed Changer | 3.7 | 93 | $4.99 |
| Tempo - Music Video Maker | 4.7 | 144,085 | Free |
| Vinyl Speed | 0.0 | 0 | $3.99 |
| Videoleap: AI Video Editor | 4.6 | 144,822 | Free |
| Videoshop - Video Editor | 4.9 | 363,461 | Free |
Should you build it?
Heavily used and done badly — the most disruptable kind of gap. Opportunity here scores 75 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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