Whirlometer is a utility app developed by Incandescent Core LLC for iPhone. It allows users to quickly and accurately measure the RPM (Revolutions Per Minute) of a turntable using the device's camera.

With Whirlometer, users can measure the RPM of a turntable with an accuracy of 0.1 RPM or better. The app offers both manual and auto video frame analysis options, which can be accessed through the settings menu.

The manual analysis mode allows users to manually analyze the video frames to determine the RPM of the turntable. On the other hand, the auto video frame analysis mode automatically analyzes the video frames and provides the RPM measurement.

Whirlometer is a handy tool for turntable enthusiasts and professionals who need to accurately measure the RPM of their turntables. It provides a convenient and efficient way to measure turntable RPM using the iPhone's camera.