Speed · 3 min read

How to slow down a video on Android

Slow motion is what makes a splash, a jump or a reaction actually readable. You don't need a desktop editor or a subscription — here's how to slow any clip on your phone, down to quarter speed, and how to slow just one moment instead of the whole thing.

The quick answer

Install Reverse Movie FX (free, 50M+ downloads, 4.5★), tap Slow Mo/Fast Mo on the home screen, pick your clip, and drag a bar down on the timeline. Down is slower, all the way to 0.25× — a quarter of normal speed. Tap Save and the slowed clip lands in your gallery. Everything below is detail.

Step-by-step: make a slow motion video

1. Install the app. Get Reverse Movie FX from Google Play. Free, no account.
2. Open Slow Mo/Fast Mo. It's the third button on the home screen, under Reverse Video and Reverse Song Challenge. You do not have to reverse the clip first — the speed editor works on any video on its own.
3. Pick your video. Any clip from your gallery works, including ones you shot months ago on a normal camera setting.
4. Drag a bar down. The timeline shows your clip as speed bars. The middle of a bar is normal speed; drag it down toward 0.25× to slow that stretch, or up toward 4× to speed it up.
5. Save. The app re-renders the video at the new speed and writes a normal file to your gallery, ready for TikTok, Reels or Shorts.

How to slow down just one part of a video

This is the part most free slow motion apps get wrong: they give you a single slider that slows the entire clip. Reverse Movie FX splits the timeline into segments, and every segment carries its own speed.

Add a speed point where you want the change to happen, then pull that one segment down. The run-up plays at normal speed, the jump drops into slow motion, the landing snaps back — which is how the effect looks deliberate instead of like a slowed-down file. Drag the divider line left or right to fine-tune exactly where the slowdown starts, and tap the × on a divider to merge two segments back together.

One constraint worth knowing: a segment can't be shorter than half a second. If you try to split too finely the app tells you the segment would be too short — nudge the divider and try again.

How slow can it actually go?

Down to 0.25×, i.e. four times slower than real time. A one-second action stretches to four seconds. Going slower than that on footage shot at ordinary frame rates starts to look choppy rather than cinematic, because there simply aren't enough frames to fill the time — which is why the app stops there instead of letting you ruin the clip.

If you know in advance that you want extreme slow motion, shoot in your camera's high-frame-rate or slow-motion mode first, then use the Speed Editor for the fine control. More frames in, smoother slow motion out.

Does it keep the sound?

Yes — the audio is re-timed along with the picture, so slowed footage gets that dropped-pitch effect. If you'd rather have music over the top than a slowed voice, the app has a built-in track library; the reverse video with music guide covers the audio options in full.

Is there a watermark?

No. Slowed clips save as clean files to your gallery — no watermark burned into the corner and no export paywall. The free version is ad-supported and a Pro upgrade removes the ads.

What about on iPhone?

Straight answer: the Speed Editor is currently Android only. The iOS version of Reverse Movie FX does reversing, music and loop modes, but not speed control. On an iPhone, if the clip was filmed in the camera's Slo-Mo mode you can adjust it in Photos; a video shot normally can't be slowed in Photos at all and needs a third-party editor. We'd rather tell you that than sell you a download that doesn't do the job.