If an app you installed without warning, quit stops, not responding, or won’t open, then follow these steps, to re-install an iPhone App if it crashes:
Steps To Fix Crashing Apps on Your iPhone and iPad
- Open your iTunes
- Tap on the applications on the left side.
- Locate the requests on the list of apps that you have right click on it and remove it by selecting delete.
- Sync your phone and go to iTunes to download it again.
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