If an app on your iPhone 18 Pro is not working as expected, one of the troubleshooting tips below may help you fix the issue.
Common ‘iOS app is not working‘ issues:
- an app won’t open
- an app won’t respond
- an app is crashing
In general, iOS works smoothly, however sometimes, you may face issues like app crashing etc. You may think that some or all of the apps installed on your iPhone 18 Pro feel sluggish or slow, if you experience this, these troubleshooting methods may help that as well. There can be many reasons for these issues, such as:
- lack of memory
- bugs in your application
- Incompatibility
- bandwidth limitation
The unresponsive app can be (a) a built-in app (e.g. Phone, Mail, News, Safari, TV, Photos etc); developed by Apple or (b) an app you downloaded from the App Store, developed by third party developers.
Unresponsive apps on your iPhone 18 Pro?
1.Restart your iPhone 18 Pro
Simply restarting (turn off and turn on) may fix this. Because restarting gives a fresh start. Simultaneously press and hold the side button and either volume button until the sliders appear, then drag the Power Off slider. Wait until your device is completely off. Then press and hold the side button until you see the Apple logo.

2.Restart the app
Completely close the app and relaunch by swiping up from the bottom of the screen and pausing, then swiping up the app. Then open the app again.

3.iOS updates
There may be system updates. These updates may fix this. To check and install iOS updates, go to Settings > General > Software Update.
4.App updates
The problematic app may have updates. Keeping your apps up to date is a good idea. Because these updates often fix bugs that may be causing your problem. Updating your app may help you. Open the App Store. Tap your picture, tap App Updates and then Update All. If you want you can also turn on Automatic App Updates by going to Settings > Apps > App Store and toggle on App Updates.
5.Uninstall and reinstall the app
To delete your app, touch and hold the app, tap Remove App, tap Delete App, then tap Delete to confirm. Now go to the App Store, tap your picture, tap Apps & Purchase History, then tap Your Apps and find the app you just removed and tap the cloud icon to download it again.
6.Close All Apps
If your app is crashing, or becomes unresponsive, it may be due to low internal memory problems (not storage). Close all your apps (see step # 2). This will free up RAM that may help you. Also you may want to force restart your device. Press and quickly release the volume up button. Press and quickly release the volume down button. Press and hold the side button. When the Apple logo appears, release the side button.

If nothing helps, you may want to contact the app’s developer for further assistance, if this is a third party app. Because app developers are responsible for supporting their applications. Here is how you can contact:
- Open the App Store on your iPhone 18 Pro
- Search for the app by entering its name in the search field
- Locate your app
- Tap Reviews then App Support. So you can contact the developer.
