Sometimes Apps generally crash either due to not much disk space available for them to execute their tasks properly or the app has gone obsolete and is unstable with the iOS version, especially the new released one like iOS 11.3. Therefore, it is vital to maintain space on your iDevice and to regularly keep your apps updated.
To check the disk space of your iOS device, follow the steps provided.
Open “Settings” app of your iOS device and tap on the “General” section.
Now, hit the “Storage & iCloud Usage” option and finally tap on “Manage Storage”. Here in you can see by yourself whether or not you have enough amount of disk space available for the apps to run properly. If not, cancel some of the apps that you don't need and then launch the Napster App and check if it works.
Head to App store and update the Napster App that is having the crashing issue. To do this, follow the steps below:
Head to App Store and tap on “Updates” tab.
Now, download and install any available updates for the Napster App that were exhibiting the crashing issue.
Check the Napster App again by launching them to see if they stop crashing now.
Note: Make sure not to use the device for any purpose until the updating process completes or it may interfere with the internet connection and may not be able to install updates properly.
2. Reinstall the Napster App That Crashes
Sometimes uninstalling and re-installing the Napster app again can do the trick required to resolve the iPhone apps keep crashing issue in iOS 11.3. The main perk of this method is that when you uninstall the Napster app it also clear out the stored cache files which sometimes are one of the major reasons of crashing down the apps in first place.
Hold on the app icon on your home screen for a couple of seconds and hit the “X” when it is visible on the app icon. You’ll then be required to confirm the action to delete the app permanently.
Head towards the App Store, search and re-install the Napster app you just deleted.
After installation, launch the Napster app and it should work smoothly now. If not, read further, we’re not done with this yet.
3. Force Reset Your Device
Try this simple but very effective technique if your iPhone apps keep crashing after iOS 11.3 update to resolve the problem.
Press and hold the Home button (Volume Down button if you own iPhone 7 or 7 plus) along with Sleep/Wake button for no less than 10 seconds or until the Apple logo appears on the screen.
Now, try and open the app again to check if you are still facing any such issues or not.
4. Disable WiFi & Cellular Data
Try this quick ruse of disabling your WiFi and Cellular Data. And then open the apps again to check if this quick fix works.
Open “Settings”, tap on “WiFi” and toggle it to “Off”.
Then, head to “Cellular”, tap on “Cellular Data” and toggle it to “Off”.
Lastly, locate the Napster App and launch it again.