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.