An APN stands for "Access Point Name". It is a gateway name which connects mobile network [which can be GPRS/2G/3G] to the another computer network on public internet.
APN Settings is the application that has the list of most of the "APN Settings" across the globe; covering many major mobile operators. Some of the key features of the application include:
1. List of APN Settings by country name and type of APN
2. Ability to search the APN Setting - Operator Name
3. Ability to APN Setting as a favorite and share socially OR with different applications using a context menu
For adding "New APN Settings" in the app please use below link: