Do you know your mobile has a sets of hardware called SENSORS. More the sensor batter the mobile.! More the sensors more the price.!! Here is a list of 25 Cool Android Sensor Apps that give your phone some very useful super powers [Freeware-Google play] A must for technical person. My mobile have 9 SENSORS and I make the most of them to make my mobile like a super power computer. This is a small list, there a number of apps based on mobile phone sensors. Try yourself first...