I test the apps in my company using a Tecno Pova 2, and the performance is far better thab my Samsung device.

Our apps contains lots of features, for example we use lots of media streaming (video player, google cast, pip, airplay), we use webviews to display our content for better compability with our websites, and AdMob. The main problem is the number of Ads used, however these are requirements from the client.