Here is the error code that Android Studio generates while running app on real device :
Uploading file
local path: C:\Users\Nikhil\AndroidStudioProjects\LoveMeter\app\build\outputs\apk\app-debug.apk
remote path: /data/local/tmp/khurana.nikhil.lovemeter
Installing khurana.nikhil.lovemeter
DEVICE SHELL COMMAND: pm install -r "/data/local/tmp/khurana.nikhil.lovemeter"
pkg: /data/local/tmp/khurana.nikhil.lovemeter
Failure [INSTALL_FAILED_OLDER_SDK]