A recent bug has surfaced when installing a smart app in the IDE. After being installed they are not showing in the mobile app.
To get correct this, follow these steps:
Go to APi -> Locations -> installed Smartapps
Tap on the recently installed smartapp.
You will see this on the screen:
Ensure that this box is NOT checked:
Tap off the edge of the pop-up. Go back to the locations screen.
Now the smartapp should be in your mobile app.
Is there a fix coming for this soon?