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March 01, 2014 (Vol. 34, No. 5)

Data Collection

  • Clear user interface
  • Some glitches with data recording
Platform: iPad/iPhone  
Cost: $0.99

Did you know that your iPad/iPhone includes a built-in accelerometer, gyroscope, and magnetometer? If you answered “no” to that question, then you are also probably unaware of the Data Collection app, which provides a simple interface for users to play around with all three of those built-in sensors. The user interface lists all three sensors and shows in real-time the values for each (displayed in the x, y, and z directions). A reference diagram is shown to orient the user with respect to the axes. If you want to use the app as a more serious tool, you can hit the “record” button to collect data from the sensors. The resulting data can be emailed as a text file. The full version allows users to record data for as long as they’d like at a user-defined sampling frequency; a free version of the app restricts recording to 10 seconds at a fixed sampling frequency of 10 Hz.

  • Key:
  • Strong Points
  • Weak Points
  • Ratings:
  • Excellent
  • Very Good
  • Good