In-app purchases
235 reviews
Content rating
Screenshot image
Screenshot image
Screenshot image
Screenshot image

About this app

Intonia is a Pitch Recorder. It's software intended to help string players visualize intonation. It combines the capabilities of an electronic tuner and a digital recorder. It keeps a memory of what it has heard, and displays pitch on a scrolling graph. You can specify what temperament to use: Equal, Just, or Pythagorean.

While it is recording, the display scrolls continuously. Your pitch is displayed as the height of the trace. If you're playing in tune the trace is white, but if you're sharp relative to your chosen scale and temperament, the trace is colored red. If you're flat, the trace is blue.

This new version never expires. The free version is limited to one minute of sound storage, A=440, equal temperament.

An in-app purchase will upgrade to the Pro version. The Pro version includes the following:
* 'A' frequency settable between 400 and 499 Hz
* Choice of Equal, Pythagorean, or Just intonation.
* File read and write. Save and restore audio files in .MP3 or .WAV format
* Rename or delete .MP3 or .WAV files
* Max file length selectable from 1 to 99 minutes
* Screen is kept on during recording and playback
* Option to lock screen rotation
* Playback and record in background mode while the screen is not showing

Here are some things you can do with Intonia:
* Play a fast passage, and see which notes were out of tune.
* See intonation in just, Pythagorean, or equal temperament.
* Tune your instrument.
* Use as a digital recorder to hear yourself play.
* Get instant feedback.
* Visualize articulations, slides, shifts, vibrato, etc.
* Use it for transcription.
* Works for all string instruments: cello through violin.
* Works for many other instruments as well.

For more information, please visit our website at
Updated on
Oct 5, 2022

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
App info and performance
Data is encrypted in transit
Data can’t be deleted
235 reviews
Benjamin I. Swisher
December 21, 2022
Succinct. Great visual of intonation. I love that you can specify the key so it's visually easier to tell where you are relative to the key. Not sure if this would be an improvement but a thought to consider; possibly placing the left column note names in the right column as well to tell a bit quicker where you landed initially without having to look over to the left and back to the right when the notes are moving a bit quicker than whole tones.
Did you find this helpful?
Emiliano Cenizo
May 25, 2020
Amazing tool for practicing with the violin. A couple of features would make it perfect, like being able to loop a part of what's recorded, and being able to see the notes of what I'm playing on top of what's recorded (that would be awesome)
8 people found this review helpful
Did you find this helpful?
Kirill Oseledets
July 21, 2022
I use Intonia all the time, but now I confused why when I change key to 4 or 5 flats all the sudden open strings G and D are shown as flat (blue color and noticebly below the "correct" pitch, with A and E in tune) on perfectly tuned violin 🎻. Looks like a bug for me.
Did you find this helpful?

What's new

Updated for Android 12.
'A' Frequency may be between 300 and 699.
New option to turn off vertical autoscroll.
Fixed playback & record in background.