GojiGo

S: We've found, because of the open-ended implementation of Android devices, the sensors GojiGo relies on will not work on some devices when the screen is locked. We test in-house using a Samsung Galaxy S5, LG G3, and a Motorola Moto X. Known devices that do not work include the HTC One M8, HTC Desire, Google Nexus One, Samsung Galaxy Note and S2.