GuitarTuna Screenshot - the most downloaded tuning app in the world.


With our high-quality guitar tuning engine, you can easily and accurately tune your guitar with a level of precision found in high-end professional tuning equipment. All in a single guitar tuner app whenever you need it.

Free Guitar Tuner App

Have you ever gone online or visited your local guitar store to buy a guitar tuner? It’s not uncommon to see tuners that cost upwards of $100. And, for the most part, all they do is tune your guitar.

You can download GuitarTuna for free and have one of the best guitar tuner apps on your iOS and Android smartphone for quick and easy access. Tuning your guitar has never been this convenient.

Accurate tuning is just one of many incredible features that GuitarTuna has to offer. You’ll also get a ton of handy features such as chord learning games, a metronome, an extensive chord library, support for multiple alternate tunings, pitch calibration, and learnable songs as well. All for the same low price of absolutely nothing!

Tuning a guitar using a mobile application


Impressive tuning functionality just scratches the surface of what our guitar tuner can do. It also has an incredible feature set that allows guitar players of all levels to improve their playing skills. So you don’t need to be a professional guitar player or a tuning wizard to easily tune your instrument. But don’t take our word for it—ask the over 100 million users that have downloaded the app since 2012!

“I literally tell all my guitar player friends to try it and not one has said anything negative about it. I love it! I can’t imagine how the developers can make it better than it already is but something tells me they will! Thanks for making an awesome app. From one musician to another, THANKS!!!” – Brad 04/15/2018

Guitar Tuner App


In its simplest Manual mode, GuitarTuna will generate extremely accurate tones right through your phone’s speakers. You simply select the string by pressing the corresponding button on the app’s tuning screen and the app plays a realistic guitar tone in the exact pitch for you. The app also displays an icon that tells you if you’re too sharp (higher pitch) or too flat (lower pitch). Using our app is the perfect way to get your guitar tuned up quickly, and it also has the added benefit of helping you train your ear.

Knowing how to tune by ear is an indispensable skill that will benefit any guitar player, whether your instrument of choice is an electric or acoustic guitar. Did we already mention that our free guitar tuner app works with bass, ukulele and a number of other stringed instruments as well? You also get to explore different tunings for a variety of instruments.

Once you have the string tuned up to the correct pitch, you then move on to the next string. Simple enough, right? GuitarTuna can actually make things even easier for you with the flexible Automatic mode. In this mode you simply play a string and the app is smart enough to figure out which string you are trying to tune. Once the tuner is locked in on the note, it will then guide you to a perfect pitch just like the Manual mode.

Guitar Tunings

Guitar Tuning Quality

Most physical guitar tuners require you to plug in with an instrument cable (which can be inconvenient), or they have some built-in microphone capability that’s similar to using the mic from your iOS and Android smartphone with a guitar tuner app. You may find that the reliability of other tuners just isn’t that great, especially when using the microphone feature. The indicator may bounce around and you’ll have a hard time getting it to stay still consistently enough to tune up.

GuitarTuna uses the world’s most advanced audio recognition algorithm—the exact one that powers the Yousician app. This gives you one of the most accurate and stable tuning platforms available online today as it will lock on to the note you are playing and easily lets you tune to pitch.

And did we mention that our app is completely free to download?

Free Guitar Tuner

Additional Guitar Tuning Tools


Standard, drop D, drop A, half step down and more


With tap-for-tempo and multiple time signatures


For alternative tunings and other stringed instruments


Ear training, chord guide, games, and exercises

How To Tune a Guitar

Simply put, if your guitar isn’t tuned properly, you’ll find it hard to play correctly and your playing will sound off. Learning how to tune a guitar the right way is crucial when you pick up the guitar and start playing for the very first time. When you’re first starting to play, you’ll typically be using the standard tuning (E A D G B E) on a six-string guitar.

Standard tuning (E A D G B E)

From the lowest (thickest) string to the highest (thinnest) string, the notes are laid out as follows:

• Sixth string: E
• Fifth string: A
• Fourth string: D
• Third string: G
• Second string: B
• First string: E

For each string to have the right pitch, it has to have the right amount of tension on it. You can adjust this by using the tuners (also known as tuning pegs) that are on the headstock of your guitar. The same kind of mechanism can be found in many other stringed instruments too. It’s pretty easy to see (and hear) how they work. Pluck a string and then turn its tuner in both directions. You’ll hear the pitch get higher as more tension is applied, and get lower as tension is removed and the strings are loosened up.

With GuitarTuna, you’ll have the most advanced, accurate, and useful guitar tuner app available to help you spend more time playing and less time having to tune up.

Check out the app to learn and master guitar, ukulele, bass, piano or singing!