How to have both Debug and Release apk on same device?

Question

While continuing to develop my application and test it on a real phone, I need to have the release version of it on the same phone, for demonstration purposes (

Answer 1

Use Android Studio because gradle make your life a lot easier - just use applicationIdSuffix

android {  
   ...  
   buildTypes {  
     release {...}  
     debug {  
       applicationIdSuffix '.debug' 
     }  
   }  
}

For more go here.