MapWalker is a free Android app that allows users to fake their GPS location. The app is primarily intended for developers to test their location-based apps, but can also be used for other purposes such as playing location-based games or accessing location-restricted content. MapWalker allows users to move their phones to any place in the world and test their own location-based apps.

It is important to note that after using MapWalker, the user's location may be locked to the last mocked location event even after the app is closed. This is not a bug and the GPS sensor is not broken. To fix this issue, users can enable their real GPS and network location receiver, go outside buildings, and try to receive GPS and network signals. They can then open a map app to check their current location is correct. For rooted devices, users can make MapWalker a system app by using Root Explorer or other similar apps and moving the apk file to system/priv-app or system/app (for Android 4.3 and older), changing the apk permissions to rw-r-r, and rebooting the device.

However, it is important to note that MapWalker should not be used on other games or apps as it may lead to unpredictable consequences. The program will not be responsible for any damages caused by such use.