Measure the exact RPM of any rotating surface with precision and ease. Two Measurement Modes: Place your phone directly on a spinning surface and let the built-in gyroscope calculate RPM in real time. Or point your camera at a rotating object, select a region of interest, and let advanced brightness analysis detect the speed for you. Live RPM Gauge & Graph Watch your readings update instantly on a smooth, color-coded gauge. A scrollable graph tracks RPM changes over the entire measurement session so you can see speed fluctuations at a glance. Lock Angle for Spinning Surfaces When your phone is on a turntable, lock the gauge so it counter-rotates and stays readable while the device spins. Read your RPM without stopping the record. Save & Compare Readings Name and save every measurement. Browse your full history, compare past readings, and review detailed graphs for each session. Built for Vinyl Lovers Whether you're calibrating a turntable, checking a ceiling fan, or testing any rotating equipment, RPM Meter gives you accurate, real-time results in seconds. Download RPM Meter and know your speed. Terms Of Use can be found at: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy: https://www.termsfeed.com/live/85060a19-55b8-4fcd-8610-af5c3b43a3b2