Using MyPoi application, you can easily access waypoints in the Google Earth / Google Map formats (KML or KMZ), saved on the phone, and navigate to it via any of the installed navigational applications. You can even do this offline, if your application can navigate offline. Why do you may need this? For example, I actively use 5 navigational applications on my phone: I will use Google map for biking, Waze for driving when there may be traffic on the roads, Sygic for offline navigation, etc. And sometimes I have a problem, that my waypoint saved in Google Map, but I cannot reach it because there no data connection. So I desperately looked for an app like this and finally decided to write my own.