A free app for Android, by mpao.

If you have more than one APN, for example, an APN for work and an APN for free time, you will need this tool to manage them. It is useful for both mobile networks and WiFi, as long as you use it with a GPS-enabled device. It also has the capability to switch between the APNs automatically. Moreover, it can send notifications to you when it detects the use of an APN that you do not have at home. Finally, MyAPN can check the status of your data plan and alert you in the event of data roaming. It is useful to know the details of your plan to avoid the risk of data roaming.