DistanceCam started out as SpeedGauge - an attempt to harness the camera view and accelerometer functionality to determine the speed of a moving object. The confidence intervals of the accelerometer readings, even with a high-pass filter, compounded with the camera-view lag, made it a completely useless application.

DistanceCam is now a range finder application, much like the other ones on the iTunes App Store, except we harness the optics equation of the iPhone camera, as opposed to geometry. Size either a human, double-decker bus (Singaporeans who have taken bus no. 28 will like this one) or an oil-tanker relative to the object to be ranged. For example, you can use it to find the dimensions of a room: get a friend to stand at the other end and size the human silhouette correspondingly.

Try it by downloading from the iTunes Store: !

Some ideas for version 2.0 - add an aircraft, use pinch-movements to zoom rather than the slider. Contact the developers: amex at amerlab.com or letch at duco.sg.