AP Tuner 3 is a legendary chromatic instrument tuner for Windows, praised by musicians for its extreme accuracy (up to 0.1 cents) and low CPU usage. While newer versions like have been released for mobile and desktop, many guitarists and violinists still prefer the "classic" AP Tuner 3 for its straightforward interface and specialized features like the harmonics graph. Where to Find AP Tuner 3 Free Download
The APTuner Downloads page provides the "Classic" version 3.0.9 for Windows. ap tuner 3 free download
A unique "Harmonic Deviation Window" allows you to visualize the frequency of each harmonic over time, helping to identify inharmonicity in strings. AP Tuner 3 is a legendary chromatic instrument