DaTuner

What DaTuner is

DaTuner is an Android chromatic tuner and metronome app for tuning instruments such as guitar, bass, violin, ukulele, banjo, cello, piano, and mandolin. It works offline and is designed for noisy environments. Auto-sensitivity can begin tuning without manual setup, while manual sensitivity adjustment is also available. The display turns green when a pitch reaches the optimal tuning range. Screen lock holds a chosen note, and filter lock isolates a selected note range. Reference frequency can be set manually or with an external reference for orchestra tuning; the stated sample-rate range is 8kHz to 48kHz. The free plan costs nothing and includes ads and fewer features than Premium. PRO adds a strobe display with up to four overtones, transposition, custom temperaments, notation options, a harmonic pitch pipe, and an enhanced tuning algorithm. Google Play says the app may collect and share app information, performance data, and device or other IDs; data is encrypted in transit and cannot be deleted. The privacy policy says microphone audio is processed on-device and is not stored on company servers.