Fix iMovie Crashing on iPhone: 9 Real Fixes

If iMovie keeps crashing on your iPhone, the fix is usually a combination of freeing up storage, updating the app and iOS, and resetting the app’s temporary data. Below are the most effective solutions, ordered from simplest to most involved, that address the common causes of iMovie crashes on iPhones.

Why iMovie Crashes on iPhone

iMovie is a resource-intensive app. It processes high-resolution video, applies transitions, and renders effects in real time. When your iPhone runs low on storage, has an outdated iOS, or is overheating, iMovie is often the first app to crash because it demands more memory and processing power than most other apps. Background apps competing for RAM, a corrupted iMovie project file, or a glitchy app cache can also trigger sudden closures.

1. Force Quit and Relaunch iMovie

The quickest fix is to force quit the app and open it again. This clears the app’s temporary memory and often resolves a one-off crash.

1. Swipe up from the bottom of the screen and pause in the middle to open the App Switcher (on iPhones with Face ID). On older iPhones with a Home button, double-click the Home button.
2. Find the iMovie card and swipe it up off the top of the screen to close it.
3. Wait a few seconds, then tap the iMovie icon to relaunch it.

If iMovie still crashes immediately after relaunching, move on to the next fix.

2. Check iPhone Storage

iMovie needs free space to write temporary files, render video, and save your project. If your iPhone storage is nearly full, iMovie will crash without warning. Apple recommends having at least 1-2 GB of free space for smooth operation of video editing apps, but more is better for 4K projects.

To check your storage:

1. Go to Settings > General > iPhone Storage.
2. Look at the bar at the top – if it’s mostly red or shows “iPhone Storage Full,” you need to free up space.
3. Offload unused apps, delete old photos and videos, or clear Safari cache to create room.

A good rule of thumb: keep at least 10% of your total storage free. For a 64 GB iPhone, that’s about 6 GB.

3. Update iMovie and iOS

Outdated software is a common cause of crashes. Apple regularly releases updates that fix bugs and improve compatibility. Check for updates:

1. Open the App Store, tap your profile icon at the top right, and scroll to see pending updates. If iMovie is listed, tap Update.
2. Go to Settings > General > Software Update to install the latest iOS version.

Installing both updates ensures iMovie works with the latest system frameworks. If you’re already on the latest versions, try the next fix.

4. Restart Your iPhone

A simple restart clears system memory and stops background processes that might be interfering with iMovie. To restart an iPhone with Face ID: press and hold the side button and either volume button until the power off slider appears. Drag the slider, wait 30 seconds, then press and hold the side button to turn it back on. For iPhones with a Home button, press and hold the top or side button.

5. Turn Off Background App Refresh for iMovie

Background App Refresh allows apps to update content in the background, which can consume memory and cause conflicts. Disabling it for iMovie won’t affect its core editing functions, but it may reduce crashes.

1. Go to Settings > General > Background App Refresh.
2. Find iMovie in the list and toggle it off.

You can also turn off Background App Refresh entirely, but that will affect other apps like Mail and Weather.

6. Delete and Reinstall iMovie

If iMovie still crashes, the app’s data may be corrupted. Deleting and reinstalling the app gives you a clean slate. Note that this will delete all iMovie projects stored on your iPhone unless you have backed them up to iCloud or another storage service.

1. Press and hold the iMovie icon on the Home Screen until the context menu appears.
2. Tap Remove App > Delete App > Delete.
3. Go to the App Store, search for iMovie, and reinstall it.

After reinstalling, iMovie will open fresh. If you had projects in iMovie, you can restore them from iCloud if you had iMovie set to sync.

7. Check for Overheating

iMovie is demanding and can cause your iPhone to heat up, especially when exporting or editing 4K video. If your iPhone gets too hot, iOS may close apps to protect the hardware. If you notice your phone is warm to the touch, stop using iMovie, remove any case, and let it cool down in a cool, shaded place. Avoid using iMovie while charging, as that generates extra heat.

8. Reset All Settings

If none of the above works, resetting all settings can fix underlying system configuration issues. This does not delete your data, but it resets Wi-Fi passwords, wallpaper, and other preferences.

1. Go to Settings > General > Transfer or Reset iPhone > Reset > Reset All Settings.
2. Enter your passcode and confirm.

After the reset, you’ll need to reconnect to Wi-Fi and adjust a few settings, but your photos, apps, and iMovie projects remain intact.

9. Contact Apple Support

If iMovie crashes persist after trying all the above, there may be a deeper hardware or software issue. Contact Apple Support directly through the Apple Support app or website. They can run diagnostics and offer specific solutions, including possible iOS recovery if the problem is system-wide.

Frequently Asked Questions

Will I lose my iMovie projects if I delete the app?

Yes, if you delete iMovie without backing up, all projects stored on your iPhone are removed. To avoid losing work, export finished videos to your Photos library or save project files to iCloud Drive before deleting. You can also enable iMovie’s “Sync Projects” in Settings to back up projects to iCloud.

Why does iMovie crash only when I export a video?

Exporting is the most resource-intensive task iMovie performs. It requires significant free storage, RAM, and processing power. If your iPhone is low on storage or has been running for a long time without a restart, export crashes are common. Free up space, restart your phone, and try exporting again.

Does iMovie crash on older iPhones more often?

Yes, older iPhones with less RAM and slower processors are more prone to crashing, especially when editing 4K video or using complex effects. If you have an older model, try editing in 1080p instead of 4K, and avoid using too many overlays or transitions simultaneously.

Can a corrupted project cause iMovie to crash?

Yes, a corrupted project file can cause iMovie to crash every time you try to open it. If you have a project that crashes, try creating a new project and importing the same media clips. If the new project works, the original project file is likely corrupted and unrecoverable.

Is there a way to recover an iMovie project that won’t open?

If iMovie crashes when opening a specific project, you can try opening iMovie in safe mode (if available) or using the “Force Quit” method. If that fails, you may be able to recover the project from an iCloud backup if you have iMovie syncing enabled. Otherwise, the project may be lost. Always export a final video copy to preserve your work.

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