The Snail 4+

Absolute Tuning


Designed for iPhone

    • 3.1 • 31 Ratings
    • $1.99

iPhone Screenshots


The Snail offers sophisticated technology to tune and analyze instruments with pristine precision. A handy guitar tuning mode is included. See what your ears hear!

The Snail is an advanced audio analysis and instrument tuning application for iPhone.

See what your ears hear

As an analogue of the human cochlea where the different frequencies are split-up and analyzed, The Snail for iPhone uses a snail grid to visualize root note and overtone structures of an incoming sound very precisely via the integrated iPhone microphone. The Snail is based on newly developed audio technology making instrument tuning easy and audio analysis musical and fun to watch.

Tune any instrument with pristine precision

Version 2 offers an additional guitar tuning mode that is available in the tuning view. Just tap on a dedicated string name, play a note and adjust the guitar tuning accordingly. Another major improvement is the new split window mode. Whenever you do any adjustments to parameters you now see how the edits affect the visualization in the upper section. This works in both visualization modes. One mode is the snail grid, a complete musical overview of the audio spectrum. The other one, the tuner view, is especially designed to focus on the root note for tuning purposes. In both views there is a sine tuning oscillator available which is controlled simply by touching the desired note on the iPhone display. There are a lot of customizable parameters. No problem if you would like to tune transposing instruments or if you need a tuning reference other than 440 Hz.

Patented technology

The well-known Ircam institute for acoustic and music research in Paris is responsible for the new technology of detection and visualization. It is a patented invention by Thomas Hélie, CNRS researcher at the Sciences and Technologies for Music and Sound (STMS) Laboratory (IRCAM/CNRS/UPMC/French Ministry of Culture and Communication). Berlin-based company SKYLIFE is responsible for the iOS port of this Ircam technology. The Snail is also available for Mac and PC distributed by Plugivery.

Key features

• Precise audio analysis and instrument tuning in two modes.
• Snail view for a sophisticated visual representation of root note and overtone structures.
• Tuner view to tune instruments and to control pitches of voices and other sources.
• Fast access guitar tuning (GT) mode.
• Split window settings menu.
• Visual gain and mic gain controllers.
• Switchable auto detection.
• Touch sine tuning oscillator.
• 2 color modes: coherency index and magnitude.
• Adjustable grid range (octaves).
• Setup for transposing instruments.
• Many customizable parameters like tuning reference, frequency tracking and audio window size.

What’s New

Version 2.2.5

The Snail is now compatible with iOS 13.

Ratings and Reviews

3.1 out of 5
31 Ratings

31 Ratings

Roozine ,

This app doesn’t work on new iPhone OS

So sad that this app that I actually use regularly stopped working all of a sudden. The only thing I can think of is that it has to do with the recent OS update that I mindlessly said yes too. Ugh technology has brought so much instability and inconsistency to my life !!!

vinnie-bob ,

Seems to regularly crap out with iOS updates

Crashed with iOS 13 and a pretty slow fix. Just updated to iOS 15 on new iPhone 13pro and it crashes immediately upon opening. This is a very interesting app when it works, but ‘when it works’ seems to be the tricky part. Great tuner too, but one of the previous updates got it to launch and the initial screen worked, but the tuner never functioned properly for me after that update. I’d pay a few bucks for it again if the developer would show it some TLC just for the tuner. But as it is, nah.

Farells ,

Sometimes literally just doesn’t work

I have this app as a VST on my computer and it’s part of my workflow. However, in a twist, it doesn’t work well here. It worked the first time I opened it, but every time since, the app doesn’t accept any sound in. The only use that comes out of it is the sine wave played as your finger travels around the interface. Expected a bit better but there is still use to be had

App Privacy

The developer, IrcamLab, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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