# Intonia — Intonation tool for strings

> Pitch recorder and tuner for string instruments to visualize intonation. (iPhone/iPad app by Jerry Agin.)

- Source: https://appshunter.io/ios/app/intonia/id1397570622 (this page in markdown: same URL + `.md`)
- Developer: [Jerry Agin](https://appshunter.io/developer/1397570621)
- Category: Music, Education
- Price: Free with in-app purchases
- Rating: 5.00/5 from 37 App Store ratings · 16 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 9 MB
- Languages: American English
- Released: 2018-11-17
- Data updated: 2026-08-08
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/intonia/id1397570622/reviews.md

## What is Intonia?

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.

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.
 * Save and restore audio files
 * Rename or delete audio files
 * Import and export audio files from/to iCloud
 * Up to 60 minutes of sound storage
 * Screen is kept on during recording and playback
 * 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 http://intonia.com/

## Key features

- Pitch recorder
- Scrolling graph display
- Selectable temperaments (Equal, Just, Pythagorean)
- Color-coded pitch feedback
- Digital recorder for playback
- Save and manage audio files (Pro version)

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Upgrade to Pro | $4.99 | one-time |


## Recent user reviews (10 of 16)

All indexed reviews: https://appshunter.io/ios/app/intonia/id1397570622/reviews.md

### 5/5 — Fantastic App!

*2026-03-02*

This is the best app for checking intonation and also includes a tuner. It’s going to make your life so much easier. It has a clean interface and you can just play and analyze your playing later (paid version), instead of having to play and having to constantly look at a tuner with one eye, to see if your note is in tune.

### 5/5 — So helpful

*2024-09-17*

I am so glad this app exists! It’s helped me with my violin intonation so much. Thank you for creating it!

### 3/5 — Great tool!

*2024-08-05, version 1.5.8*

I think the letter on the left can be coloured instead of white to make it easier for students to see.

### 4/5 — Not working after updating to iPadOS 16 6.1

*2023-09-10, version 1.5.8*

Before updating, the app just worked perfectly. However, I can’t record anything and it doesn’t display any pitches after updating to iPadOS 16.6.1. Please fix the bug!

### 5/5 — Super helpful for beginner cello player

*2023-06-11, version 1.5.8*

I’m so glad I found this app.
As a beginner cello player I am struggling with intonation a lot and I was practicing intonation a lot in isolation and was never happy with results.
Analysing recordings, I was surprised to find out I am playing relatively in tune and "bad sound" comes mainly from bowing and overall technique, rather than intonation

### 5/5 — Love it. I never practice without it

*2022-12-08*

I love how simple it is to use. No ads and it works just as advertised. Perfection

### 5/5 — Amazing

*2021-11-22*

This app is exactly what I was looking for. It’s very simple and has no unnecessary features or ads, which says a lot about the developers. Changing keys is easy and it reads audio almost instantaneously. It also shows note duration so you can visually see whether your rhythm is even and consistent.

It is worth mentioning that, at least from my experience, it works best for stringed instruments, specifically bowed string instruments. It’ll only pick up specs of a piano or guitar, for example, but that’s fine since those instruments don’t have to worry about intonation. It may work for brass and woodwind instruments but I can’t say. The fact that it only solidly registers my violin has actually come in handy since any background noise is not an issue.

### 5/5 — Brilliantly effective!

*2020-10-23*

This app not only showed me why my playing didn’t sound so great, but also how terribly uneven my vibrato was. After using this for about six months, my playing is much more in tune, and my vibrato is coming along. 

As a calligraphic artist, I especially enjoy the way the internation line looks like a brush stroke. When it’s in tune and the vibrato is steady, it’s a work of art. When it’s out of tune and you have a lot of bow noise and your finger isn’t quite contacting the fingerboard, it looks as terrible as it sounds! 

Love it. It is truly an inspired app.

### 5/5 — Great app and glad to see it has an iOS version.

*2020-10-04, version 1.4.6*

I used this app a few years back on my Mac Laptop. It worked great then and works even better now as I did not always have my Mac in my studio. It is so convenient and easy to use.

I couple it with using a drone on my tuner to play scales and passages and it is instant in tracking my pitch. It works really well with double bass and with the simple change in range adjustment in the settings, it captures C1 perfectly. You can save your files or delete right away. Great for recording a passage or complete piece and then looking at the file visually it really helps you to hear the pitch issues as it visually shows you as well.

Works on my iphone as well as my iPads and laptop, so I no longer have an excuse for really zeroing in on my timing and shifts. Thanks Jerry for developing the iOS and droid versions.

### 5/5 — Exactly what I needed

*2020-05-28*

Beth Blackerby of violinlab.com recommended this app as a tool for checking intonation.  It has been very useful in helping me to learn correct finger placement and I definitely feel that it has made a big difference in helping me to more quickly develop muscle memory on the fingerboard.

## Frequently asked questions about Intonia

### What temperaments can I use with Intonia?

Intonia supports Equal, Just, and Pythagorean temperaments. The free version is limited to Equal temperament, while the Pro version allows you to choose from all three.

### How does Intonia help with intonation?

Intonia displays your pitch on a scrolling graph. It shows if you are in tune (white), sharp (red), or flat (blue) relative to your selected scale and temperament, providing instant visual feedback.

### What are the limitations of the free version of Intonia?

The free version of Intonia is limited to one minute of sound storage and only supports A=440 tuning with equal temperament.

### What features are included in the Pro version of Intonia?

The Pro version unlocks features like a settable 'A' frequency, choice of all temperaments, saving/restoring/managing audio files, up to 60 minutes of storage, and background recording/playback.

### Can Intonia be used for recording my practice sessions?

Yes, Intonia functions as a digital recorder. You can record yourself playing to hear your intonation and other nuances like articulations and vibrato.

### What instruments is Intonia suitable for?

Intonia is designed for all string instruments, from cello to violin, and works for many other instruments as well.

### How often is Intonia updated?

The latest version of Intonia is 1.5.8, last updated on March 25, 2023. This indicates regular updates to improve functionality and reliability.

### What is the user sentiment for Intonia?

Intonia has a perfect rating of 5.0 stars from 35 ratings, suggesting very positive user sentiment and satisfaction with its features and performance.

## Version history (last 5 releases)

### 1.5.8 — 2023-03-25

Bug fix

### 1.5.6 — 2022-03-02

Bug Fix

### 1.5.5 — 2021-11-29

Updated for iOS 12

### 1.5.4 — 2021-06-19

Bug fix

### 1.5.3 — 2021-05-29

Bug fix.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-08.*