Place Clock is a mixture of alarm clock and gps navigator. The program works in three modes. 1 The alarm clock is understandable. 2 Gives a signal from GPS navigator when you enter a specific area. 3 Mixed mode, alarm clock but in a certain place. According to the description of the developers, they tried to reduce the power consumption as much as possible. It seems to have worked out. True, there is one nuisance, my native iPhone alarm clock stopped working 🙂 Install from AppStore