> keeping an app active and functional does require maintenance. Only for _acquiring_ new customers on _very new_ devices. Old customers on new devices are j

> keeping an app active and functional does require maintenance. Only for _acquiring_ new customers on _very new_ devices. Old customers on new devices are just fine. https://developer.android.com/topic/libraries/support-library https://developer.android.com/topic/libraries/support-librar... Goes all the way back to Android 4.