• Use the camera to measure the rotation speed
• Measure rotation speed in recorded videos (slow motion video works best)
• If you don't have a spinner, try other spinning things or look at the example in the app
• Use a different colored background than the spinner. For example, white spinner in front of a black background.
• Note that depending on the spinner and camera speed, different maximum speeds can be detected. E.g: With iPhone 6s and 3-side spinner: approx. 1800 spins/minute
The app is very new and I'm looking for feedback and suggestions. If you have any questions, feedback, suggestions or problems with Spinner Speed please don’t hesitate to contact me at firstname.lastname@example.org