Dark Sky Meter
The app (iPhone only) uses the camera to collect light at night. The aim is to provide a cheap alternative to expensive light meters, help (amateur) astronomers and ecologists. When you submit your measurements the data is used for scientific research. The app got awarded by the IDA and has been featured on BBC, CBS and Scientific American. The app is developed by Norbert Schmidt and Harro Treur, and supported by many scientists, Globe at Night, Stars4all and the International Dark Sky Association.
Measure artificial light at night (light pollution) with an iPhone app which acts a photometer. Send the results to light pollution researchers worldwide.
How to participate
People can download the app (search for Dark Sky Meter in the app store).