Cell Cease works only on a phone that runs on Windows Mobile and has GPS. If the app detects the phone moving faster than 5 mph, it blocks the ability to send or receive most phone calls, with the exception of 911 and specially allowed numbers that parents can program. The software operates on a PIN code that parents can guard.
There are some very obvious, very notable downsides to Cell Cease that will prove vexing to other software developers and cell phone-makers trying to tackle the same problem. For instance, Cell Cease eats up battery life, reducing usable time by 20%, but that’s nothing compared with the inconvenience posed by the 5 mph limit. Cell Cease can’t tell why you’re moving faster than 5 mph, so if you’re on a boat, plane, train, bus, walking fast or even the passenger in a car, the phone will still be nothing more than a pretty paperweight.