How to change the slow-motion frame rate on an iPhone
2 min read · 4 steps · Updated 4 October 2026
Open Settings, tap Camera, then Record Slo-mo, and tap 1080p HD at 120 fps or 1080p HD at 240 fps. At 240 fps, the default, a minute of slo-mo needs about 480 MB. At 120 fps it needs about 170 MB.
- Device
- iPhone
- Shown on
- iOS 26.5 (iPhone 17)
- App
- Settings
- Path
- Settings › Camera › Record Slo-mo
- Real screenshots
- 4 of 4 steps
- Checked
- October 2026
- Sources
- 1 official, linked below
Slo-mo on the back camera is set to 1080p HD at 240 frames per second. That is also the setting with the larger files. Half the frame rate takes about a third of the storage.
The screenshots show iOS 26.5 on an iPhone 17. On older versions the rows have the same names, with a slightly different look.
Step by step
Open Settings and tap Camera
Camera is in the first group of the main Settings list.
Tap Record Slo-mo
The row shows the current setting at the right, here 1080p at 240 fps.
Tap the frame rate
There are two choices on this iPhone: 1080p HD at 120 fps and 1080p HD at 240 fps. The tick shows the active one.
Compare the file sizes
The page lists them: a minute of slo-mo is about 170 MB at 120 fps and about 480 MB at 240 fps. It also says the front camera always records slo-mo at 120 fps.
Good to know
Apple notes that on supported models Record Slo-mo also offers 4K at 120 fps from the back camera.
For normal video: how to change the video resolution and frame rate on an iPhone.
In short: Settings, Camera, Record Slo-mo, tap 120 or 240 fps.
Links checked on 3 October 2026. Rules and prices change. Check the official source before you act.