# Tonic vs Functional Harmony

The clearest difference is review sentiment: Functional Harmony at 83% against Tonic's 39%. Functional Harmony also leads on rating (4.9 vs 4.0). Tonic's advantage is update cadence (weekly vs every 6 months) and ratings volume (204 vs 24). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Functional Harmony holds the better App Store score, 4.9 against 4.0. That said, the two scores are not equally well evidenced: Tonic has 204 ratings behind it against 24, so its average is the more settled of the two. Written reviews point the same way: 39% of Tonic's written reviews are positive against 83% of Functional Harmony's.

Tonic ships an update weekly, Functional Harmony every 6 months. The most recent releases landed on August 14, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | Tonic | Functional Harmony |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (204 ratings)](https://appshunter.io/ios/app/tonic-ar-chord-dictionary/id1427039232/reviews) | **[4.9 (24 ratings)](https://appshunter.io/ios/app/functional-harmony/id1564025162/reviews)** |
| Number of ratings | **204** | 24 |
| Positive reviews | 38.8% of reviews | **83.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 6 months |
| Monetization | Free | Free |
| Size | 13 MB | 24 MB |
| Requires iOS | **11.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Coda Labs Incorporated](https://appshunter.io/developer/1139019669) | [Dylan Shade](https://appshunter.io/developer/1564023750) |

## What reviewers say

### Tonic

[App page](https://appshunter.io/ios/app/tonic-ar-chord-dictionary/id1427039232)

This app uses augmented reality to display over 130 chords directly on your piano. It guides you on finger placement, making it easier to learn and play chords, especially for those who don't read traditional sheet music. Ideal for musicians of all levels.

**Highlights:** Augmented reality chord display, Over 130 chords, Finger placement guidance, Flat/sharp display modes, Works with various piano sizes, 3 octave options

**In-app purchases:** none

**What reviewers like**

- 💡 Cool idea for learning
- 👍 Great for beginners
- 🚀 Works well (for some)
- ✨ Amazing application of AR
- 😊 Helpful for learning chords

**What reviewers complain about**

- 🐛 Calibration issues
- 🐛 Alignment problems
- 🐛 Doesn't work on smaller keyboards
- 🐛 Limited chord selection
- 🐛 Second target doesn't appear

**Reported bugs**

- Calibration doesn't work
- Dots move perpendicular to what they should
- App thinks piano is rotated 90 degrees
- App won't pick up the piano
- Keys never show

**Requested features**

- Fix calibration tool
- Make YouTube video with instructions
- Add more chords (9ths, 11ths, 13ths, jazz chords)
- Add chord inversions
- Support for smaller keyboards


### Functional Harmony

[App page](https://appshunter.io/ios/app/functional-harmony/id1564025162)

This music theory app helps users spell chords and scales by entering a root note. It also identifies intervals when two notes are provided. Learn music theory concepts quickly and easily.

**Highlights:** Spell chords, Spell scales, Identify intervals, Enter root note for chords/scales, Enter two notes for interval identification

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Tonic free?

Tonic is free to download, with no in-app purchases.

### Is Functional Harmony free?

Functional Harmony is free to download, with no in-app purchases.

### Which has better reviews, Tonic or Functional Harmony?

Functional Harmony is rated higher. Tonic averages 4.0 out of 5 from 204 ratings, while Functional Harmony averages 4.9 from 24 ratings.

### Do Tonic or Functional Harmony have ads?

Neither Tonic nor Functional Harmony shows ads.

### Which is updated more often, Tonic or Functional Harmony?

Tonic ships an update weekly, and Functional Harmony every 6 months. Most recently, Tonic was updated on August 14, 2026 and Functional Harmony on September 6, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*