Acoustic Ruler Pro: Measuring Distances via Sound in iPad, iPhone

Acoustic Rule Pro is an iOS app that measures distances via sound. You can use either your headphone as a receiver or use two iOS devices (iPad or iPhone) as the sender and the receiver to measure distances. It is a good app to have to measure distances approximately. Watch the video for details and see how it is done. It is priced in iTunes at $0.99.

The below video is a demo of this app for two devices:



Via Iqtainment.