Find my friends
A friend went for a beer and it's not two hours? Mom caught at the most inopportune moment? Daughter went to college, but there is a suspicion that she is dancing?
Try to always know where your friends and relatives are. Of course, the program will only work if geolocation is enabled and there is an Internet connection. The program does not store data about your movement, does not use third-party servers, location data is removed only upon request from your friend, the GLONASS / GPS receiver is turned on only when a friend has requested your location and turns off immediately after its determination, which significantly saves battery power.