An easy-to-use accurate audio/visual tuner for your guitar.

Provides a simple interface to visually check whether the pitch for each string is low or high, and lets you "see" the pitch change as you wind/unwind the string tuning machines. Tuning has never been easier.

Shows exactly how many cents (1/100ths of a semitone) a note is out-of-tune.

- Extremely accurate - within 1 cent (1/100th of a semitone) of each note with sub-second response time.
- Developed in Austin, Texas, the "Live Music Capital of the World".
- Use the standard tuning E-A-D-G-B-E or one of many alternate tunings: regular tunings such as Minor Third, special tunings such Drop D, open tunings such Open C, lower tunings, higher tunings.
- Adjust pitch incrementally from 400 to 480 Hz or up/down a half/full step from A440. (The International Organization for Standardization specifies the frequency for the note A in the treble stave as 440 Hz. ISO 16:1975).
- Tap to hear an accurate note if tuning by ear instead of using visual tuning.
- Enable/disable Auto-string-detect (not recommended for noisy environments).

What’s New

Version 2.4

Bug fix for temporary freezing when note played on iOS 11

Ratings and Reviews

4.8 out of 5
248 Ratings

248 Ratings

ProbablyNoah ,

My Favorite

First of all, to all those complaining it hasn’t been updated - it doesn’t need to be! It works great, who cares if it fills the entire screen on my iPhone 11? There’s a lot out there, but this is always my go-to. Super simple and easy to use, it lets you know just how close or far off you are. Love the interface. Great work! I’ll be using this for years to come.

guitar-student ,

Privacy is King

I won’t download an app unless it respects my privacy. It doesn’t always mean you end up with the best app but that is the choice I made. In this situation I believe it also landed me the best App of it’s kind as well. I am very happy, it works perfectly on my iPhone 11.

GulfBob ,

Quick Simple Accurate

Simple, reliable and accurate. Pick up the guitar, tune it in a few seconds and ready to play. Especially good when I'm out and get to play someone else's guitar. I use this every day!


Peter Deelstra
14 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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