Motor Pitch Analyzer vs LinkRay Scanner

MotorPitchAnalyzer (MPA) is an app for measuring small motor rotation speed in real-time.  Just bring the motor close to your smartphone's microphone for easy measurement!  You can improve accuracy by narrowing the measurement range.  The app shows the motor's maximum rotation speed based on stable rotation and frequency intensity.  You can also quickly check for shaft runout and brush conditions by viewing the motor sound waveform in real-time (※ for rough guidance).  Please measure in a quiet place for accurate results.  Note that measurement accuracy may vary slightly depending on your iPhone or iPad's microphone performance.

LinkRay Scanner reads LinkRay (HikariID) optical IDs transmitted by LED lighting. Point the camera at a participating light, and the app decodes the ID that light is broadcasting and shows what it is linked to. WHAT IT DOES - Decodes LinkRay IDs from LED lights using the rear camera - Looks up each scanned ID and opens the content mapped to it - Keeps an on-device log of what was scanned and how the camera performed - Uses a published camera profile for your iPhone model HOW IT WORKS A LinkRay light carries a short numeric ID by flickering faster than the eye can see. The app samples that flicker through the camera and recovers the ID. Recovery depends on the precise timing of the camera sensor, so the app relies on a camera profile published for your specific model. WHAT YOU NEED - A LinkRay-equipped light to scan - A network connection: the app loads its screens and the content for each scanned ID from the LinkRay Scanner server - A published camera profile covering your iPhone model ON MEASUREMENT This app decodes using camera profiles that already exist. It does not measure or calibrate new profiles. PRIVACY Video from the camera is processed on the device and is never uploaded. Diagnostic records of a scan - your device model, decode timings and the result - are sent to the LinkRay Scanner server so that profiles can be improved. The privacy policy at https://linkrayscanner.piecefuture.duckdns.org/privacy explains what is kept and how to have it removed.