I don't see my app in the screen (iPhone) and when I go to the App Store that app won't open

[iMore Question]

I am unable to find an app on my iPhone screen and when I try to reload it in the App Store,!the open button doesn't open it, nothing happens. The app is still on iPad and works fine

 

[Tartarus]

I know this sounds clich? but have you tried restarting your device?

Also, in the worst case scenario you can delete that app from your iPhone and reinstall it. Most of the times that helps.