No matter what size your device is, there is always that possibility of it slipping off your fingers. Face it, devices aren't as hardy as they were before. I can still remember those good ol' Nokia phones that could be dropped and manhandled and washed and still usable! (after some heat from the hair dryer)
FLYGRIP promises to extend the lifespan of our mobile devices. We aren't talking about battery lifespans or warranty periods, but the simple fact that your device clips on to your fingers. A spring loaded clip assists to keep your device snug and safe and yet allow flexibility for your thumb to tap on the keyboard.
If you are one of many who has butter fingers, you might consider getting it here, for USD $29.95 each.