Grooved is a free iPhone app developed by Ivan Mathy in the Utilities & Tools category. It offers a straightforward solution for calibrating the speed of your turntable by playing a record. Whether you already have a turntable with visual calibration features or find yourself struggling to set the right RPM, Grooved provides a user-friendly alternative for accurate calibration.

Using your device's built-in microphone, Grooved analyzes the playback and indicates if your turntable is running fast, slow, or at the perfect speed. The app's simplicity shines through its one-function design, allowing users to easily adjust their turntable speed following the manufacturer's instructions until the calibration is spot on.