# Synesthesia vs Functional Harmony

The clearest difference is review sentiment: Functional Harmony at 83% against Synesthesia's 38%. Functional Harmony also leads on rating (4.9 vs 2.3). Synesthesia's advantage is update cadence (monthly vs every 6 months) and iOS requirement (8.0 vs 18.0). On price, ratings volume, ads and in-app purchases 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 2.3. Both are backed by a comparable volume of ratings — 16 and 24 respectively. Written reviews point the same way: 38% of Synesthesia's written reviews are positive against 83% of Functional Harmony's.

Synesthesia ships an update monthly, Functional Harmony every 6 months. The most recent releases landed on June 1, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | Synesthesia | Functional Harmony |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (16 ratings)](https://appshunter.io/ios/app/synesthesia-music-visualizer/id1046438840/reviews) | **[4.9 (24 ratings)](https://appshunter.io/ios/app/functional-harmony/id1564025162/reviews)** |
| Number of ratings | 16 | **24** |
| Positive reviews | 37.5% of reviews | **83.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 6 months |
| Monetization | Free | Free |
| Size | 31 MB | 24 MB |
| Requires iOS | **8.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Christian Auzinger](https://appshunter.io/developer/918405870) | [Dylan Shade](https://appshunter.io/developer/1564023750) |

## What reviewers say

### Synesthesia

[App page](https://appshunter.io/ios/app/synesthesia-music-visualizer/id1046438840)

Experience music through a spectrum of colors, mimicking the sensory phenomenon of synesthesia. Use it as a dynamic mood light, a calming night light, or to visualize the pitches of songs and instruments.

**Highlights:** Music visualization, Mood lighting, Night light functionality, Pitch to color mapping, Microphone access for real-time audio

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 Synesthesia free?

Synesthesia 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, Synesthesia or Functional Harmony?

Functional Harmony is rated higher. Synesthesia averages 2.3 out of 5 from 16 ratings, while Functional Harmony averages 4.9 from 24 ratings.

### Do Synesthesia or Functional Harmony have ads?

Neither Synesthesia nor Functional Harmony shows ads.

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

Synesthesia ships an update monthly, and Functional Harmony every 6 months. Most recently, Synesthesia was updated on June 1, 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.*