A-Tuner

A-Tuner is a full-featured, ad-free chromatic tuner for a wide range of instruments, from strings to winds. Its uncluttered display lets you focus on tuning and practice.

Play a note and your device's microphone picks it up. A rotating indicator and bar show whether the pitch is sharp or flat, while the note name, octave, frequency, and pitch deviation appear at a glance. Pitch deviation is displayed in 0.1-cent increments, helping you make fine adjustments with confidence.

The built-in tone generator can play the note of your choice, and the metronome is ready for everyday practice. You can also adjust the concert pitch, input sensitivity, in-tune tolerance, and display theme to suit your instrument and playing environment.

Key features:

• Pitch deviation displayed in 0.1-cent increments

• Clear visual guidance with a rotating indicator and bar

• Note name, octave, and frequency display

• Adjustable concert pitch

• Automatic or manual input sensitivity

• Transposition

• Automatic or manual note selection

• English, German, Dutch, French, and Italian note naming systems

• Octave stretch tuning for keyboard instruments

• Light and dark display themes

• Selectable reference tones

• Metronome

14 historical temperaments:

• Pythagorean

• Quarter-comma meantone

• Just intonation (major and minor)

• Werckmeister III, IV, and V

• Young I and II

• Kirnberger I, II, and III

• Vallotti

• Kellner

Use standard equal temperament or explore historical temperaments to find the sound that best suits your instrument and music.