title: Ionic build android apk : Application not installed
body: <p>I have build a ionic app which generated .apk file on "ionic build android --prod --release" command. When I copied that .apk file in mobile, application is not installed error comes after I tap install button.</p>
  
  <p>Note: I have marshmallow os.
  I have latest Android studio installed.
  My Android SDK tab -> SDK platforms :
  Android 7.1.1(Nougat) status: Installed.</p>
  
  <p>All other are unchecked and not installed!</p>
  
  <p>Is this the problem that I haven't installed Android 6.0 marshmallow in Android sdk and i am trying the Android 7.1.1 Nougat build version on my 6.0 marshmallow os ?</p>
  
  <p>Any help would be appreciated!</p>