Distance Measure allows you to find distance, and estimate distance. Quick distance measurement, calculator or estimator using: screen (for small object), camera (for short distance), GPS/Network (for long distance). How to measure using screen: put the object on your phone's screen, drag the button to start measurement. Hold up your phone in Landscape orientation and estimate the phone's distance from ground. Then aim the camera at the object which you want to calculate the distance. The target should be at same ground level from where you're standing. If not, you need to do some adjustment.