Unable to download apps in my iphone

Try the following solutions: 

1. Check your WiFi connection. If you're using cellular data or WiFi and having issues with app downloading, try to connect to different WiFi network. 
2. Try deleting the app then restart the app download. 
3. Restart your iPhone, then go to the App Store and redownload the app. 
4. Check and manage your iPhone storage space. Maybe you don't have enough storage space on your iPhone which is why you can't download or update apps. 
5. Try signing out of the App Store then sign in again 

If the following solutions above did not fix your problem, try to reach out to Apple Support. 

Hope it helps! 

See the Apple Support article(s) below.

Apps won’t downloaded.  

Try a forced restart.

Reset Device.      

If necessary

Hard reset.        

Do a backup and try a factory reset. Then restore from your backup.

Restore to Factory setting.      

Backup - Restore your device from an iCloud or iTunes backup.