Apps not working

Hi, which Apple devices you are referring to? iPhone, iPad, MacBook....?

If an app on your iPhone or iPad stops responding, closes unexpectedly or won’t open:

Delete the app, then download it again

Delete the app. When you do this, you might lose data that was stored in the app. Then redownload the app. Then check to see if the problem with the app is fixed.

If an app on your iPhone or iPad stops responding, closes unexpectedly or won’t open – Apple Support (AU)

Hello,

What apps? What are the symptoms? Won't open? Won't respond? See this:

If an app on your iPhone or iPad stops responding, closes unexpectedly, or won’t open - Apple Support

Good luck.