5 Things You Didn't Know Your Android Smartphone Could Do. Okay, I knew I could make a mobile hotspot out of my Note 3. But, using it as a bubble level, and the strides that have been made by Google Goggles? Not so much. Measuring the distance to the hole in golf? Measuring lengths? Digital compass? Measuring decible levels of sound? All these and more will your Android smartphone do for you. And, they are free. Have fun.