Motion Data Logger is a simple but effective way to collect motion data from your iOS (iPhone, iPad or iPod touch) device and export it to a CSV file for further preprocessing.

The app uses the built-in accelerometer, gyroscope and magnetometer hardware to gather all data. You can select your preferred sampling rate as well as your maximum recording time or data points. After recording you can export the data to a CSV file and send it by email or save it to your Dropbox account directly.

Note: To enable the recording of your sensor data in background you need to permit your app the location tracking while your app is not in use. Please keep in mind, that continued use of location and sensor tracking in the background can dramatically decrease battery life.