Guitar Tuners - Version 1.0 Guitar Tuners lets you tune your guitar in seconds for free using a microphone so that you guarantee the perfect pitch of your instrument every time. Just play a note, and Guitar Tuners will display which note you're playing, and how close you are to having that note in tune. The needle on this Guitar Tuner will turn blue you have an exact match. Just play each note on your guitar (E, A, D, G, B, E) or other musical instrument, and get in tune! Why waste time and money at the music shop when you can have a completely free Guitar Tuner downloaded onto your computer in just a matter of seconds.