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Slow Fast Slow is an app for manipulating the speed of videos you shoot on your iPhone. It works especially well with slo-mo videos. Use the intuitive interactive timeline to slow down or speed up your videos. Additionally, you can add pitch control, as well as clip reversal.

• Import videos from your Photo Library.
• 240 fps videos (iPhone 6 and 6 Plus) can be slowed down to 1/16 speed, which is twice as slow as the built in camera app.
• Pitch Control: Retain the correct audio pitch even when the video is sped up or slowed down.
• Backwards playback.
• Add and remove points to adjust the timeline.
• Export videos in the original ratio or square.
• Requires iOS 10.

What’s New

Version 2.5

This app has been updated by Apple to display the Apple Watch app icon.

- Added a new Studio Neat Store. Now you can purchase many of our products, right in the app with Apple Pay.
- Reversed the ordering of the home grid. The latest project is now listed first.
- Various visual design tweaks.

Ratings and Reviews

4.4 out of 5
439 Ratings

439 Ratings

c_e_santana ,

Does its job but...

The infrastructure is maddening. I was surprised to learn that it was developed by a design firm because some functions are completely impractical. Before I even start on a new set of videos I have to erase a bunch of videos that I already have no use for. Also, it asks you to select videos, but first you have to remember to deselect previous videos, and then asks you to select the videos again before you can work on them. It adds much more work than needed. Not a problem if you’re just using the app once in a while, but frustrating if you’re using it everyday for multiple videos.

SmallEngMech ,

Great Free App That Truly Works Well

I’ve tried other apps to speed up my videos and they stop at 4x speed increase, lose my HD video quality, and just don’t work that well. This one is a really good app — it’s easy to import and export videos and allows for multiple points you can put in a video to speed up/slow down certain points. This one allows up to 8x speed increase of the imported video, so for faster ones you’ll have to save and import the video again but that’s easy enough. I haven’t seen any ads yet either beyond a quick message when you open the app for first time after downloading then any time after that just a quick small message that you can click on to go to their website or continue with what you’re doing instead of annoying ads that become a nuisance. Definitely recommend this app though! It works great so my videos still have the HD quality and a nice smooth high speed playback after saving the edited video that I then import into iMovie and this works great! I use this as iMovie will only increase a video up to 2x original speed.

Evvviieee ,

Better than Photos, amazing fine tuning

First off, this app does not push any in app purchases for “unlocking” certain features or packages. That is AMAZING because we are all tired of downloading “free” apps just to realize that the reason for downloading them costs $1.99 to “unlock”. Anyway, this app has a super clean layout that is user friendly (extremely easy to use) and I prefer it 100% over the iPhone Photos app editing of slow motion/videos in general. You can choose the points at which the speed changes and by how much just by dragging the dots (great for visual people like myself) and it also allows you to trim. Can the developers release more editing apps because I will download them all

App Privacy

The developer, Studio Neat, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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