Easily measure the actual RPM of your turntable with this straightforward tachometer. It provides detailed readings including minimum, maximum, and average RPM, along with percentage discrepancy and wow and flutter measurements.






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True Note is great, but it's not the only option. Explore 10+ similar apps for iPhone and iPad, each reviewed and rated by real users. Find free alternatives, premium upgrades, and hidden gems.






Easily measure the actual RPM of your turntable with this straightforward tachometer. It provides detailed readings including minimum, maximum, and average RPM, along with percentage discrepancy and wow and flutter measurements.



Easily calibrate your turntable's speed using just your device's microphone and a record. This app analyzes the playback speed of your vinyl and tells you if it's running fast, slow, or perfectly accurate. Adjust your turntable based on the feedback until you achieve optimal playback.




Create professional, branded sales estimates and invoices for your business. Track payments, manage customer information, and calculate profit margins with ease. Streamline your field service operations and win more jobs.


Access powerful AI capabilities directly through your device. This app provides real-time, personalized responses to your queries and enables advanced AI tasks like image generation and text editing. Enhance your productivity by integrating with popular AI APIs.


Control your Waxwing DSP Phono Preamp with this app. Adjust gain, activate special modes, save custom settings, and fine-tune your audio for the best vinyl listening experience.




This application transforms your smartphone into a digital tachometer using its flashlight. It measures the rotational speed (RPM) of objects by flashing light at them, making them appear stationary when the flash rate matches their speed. Save readings and use it for mechanics, education, or industrial checks.


Measure rotational speeds of objects using your phone's flashlight, laser, or magnetic sensor. Detect precise RPMs with adjustable flicker frequencies and a wide measurement range. Ideal for analyzing fan speeds, engine RPMs, and more.


Measure rotational speed using your phone's camera or a simulated strobe light. Simply mark the rotating object and adjust the settings until it appears stationary to get an accurate RPM reading. The app also functions as a torchlight.