Most of the users manage Wi-fi, GPS and Bluetooth manually. You can manage Mobile Data by using APN widgets. But sometimes you may forget to disable it before the screen goes off. Apn4Apps disables mobile data when the screen is off and enables according to the selected applications. If your selected application which needs internet connection starts to run on the foreground means you actually start using your selected application, Apn4Apps enables the mobile data automatically. It doubles the battery life without complex settings like battery savers. There are applications still running at the background downloading data even if you disable auto-sync and background data. So Apn4Apps is also very useful for users who have limited internet plan.
APN4Apps requires minimum Android version 1.6. Below v2.2 it modifies the APN settings using apn4apps suffix. For v2.2 and higher versions APN4Apps manages mobile data without modifiying APN settings