Bioacoustics application that gives current temperature readouts by listening to crickets! This app uses the iPhone's built-in microphone to detect the chirping of Tree Crickets, and computes a temperature value based on the rate of chirping. The readout is usually accurate to within a degree or two.
Note: CricketSong listens for snowy tree crickets, which have a very rhythmic chirping, and filters out other crickets, like field crickets, which are more sporadic when they chirp.
Works best within 20 feet of a tree cricket.