guitarFineTune is an app. that aids in tuning electric and acoustic guitars.

guitarFineTune in short

• guitarFineTune is an app. that aids in tuning electric and acoustic guitars.
• It has a very high resolution. Measurements are in 0.1 Hz resolution.
• All strings can be tuned simultaneously. The measured sound for all 6 strings are all shown at the same time, and compared with the sounds for the strings as they must be, when the guitar is in perfect tune.

Features

• Fine tuning of guitars.
• Displays the actual tone of the guitar strings compared to their correct tone in
  resolution, 0.1 Hz.
• Can be used with both acoustic and electric guitars.
• Can let the sound pass through so you can hear the electric guitar.

What's New:

Version 9.7.1

• New framework.

New in version: 9.6.2:

• Output Mix settings are remembered.
• audio Control settings are remembered.
• Better "windowing" so false frequencies are not shown.
• Guitar String Tones fade out without "clicks"

Screenshots:

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