To remove the Smartcode application from your Android device tap the 'app draw' icon

Then navigate to settings

App & Notifications

 

Then locate the Smartcode app and tap on it

 

 

Then tap 'Storage'

 

Then tap 'Clear Storage'

 

 

Tap OK to confirm

 

Your apps data will now be cleared, if you return to the Smartcode app you will see this screen. Your device is now ready to be reinitialised