Android App Crashes on Real Device If apk is manually installed

If you just upgraded your android studio.

You will not have this option to disable -> Instant Run. (not on the menu)

Seems like with new android studio and gradle upgrade in order to install an apk you need to properly build it.

Option 1: with gradle from command line

./gradlew :appName:clean  
./gradlew :appName:build

Option 2: from android studio

Android Studio -> build -> build APK (or generate sighed APK)

The generated apk can be installed fine on a device.

Note: if you start a new applicate with this version of android studio you will see that when you run from studio there is no apk generated anymore.

Just go to:

Android Studio --> File --> Setting --> Build, execution, deploy --> Instant run.

and disable instant run.