For the department of Social Psychology of the Radboud University I have developed an iPhone app that will be used in sleep research. This app collects acceleration and audio data simultaneoulsy. In order for the app being able to run for an indefinite amount of time, data is stored in multiple files, e.g. of 1000 data points describing acceleration, or 1 hour of audio. Using iTunes file sharing these files can then be imported to a computer, where the collected data can be analyzed.
Hopefully the experiments using this app soon commence and provide interesting results!