# Visualised Audio vs Three9x

The clearest difference is in-app purchases: Three9x at none against Visualised Audio's 3. Three9x also leads on update cadence (every 5 weeks vs every 14 months) and iOS requirement (15.6 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Visualised Audio sells 3 one-off in-app purchases. Three9x asks for nothing beyond the download.

Visualised Audio ships an update every 14 months, Three9x every 5 weeks. The most recent releases landed on October 8, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Visualised Audio | Three9x |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/visualised-audio/id1111275756/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 496 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Magnus Olsson](https://appshunter.io/developer/955492390) | [THREE9X (SMC-PRIVATE) LIMITED](https://appshunter.io/developer/6782750724) |

## What reviewers say

### Visualised Audio

[App page](https://appshunter.io/ios/app/visualised-audio/id1111275756)

This app analyzes single musical notes, displaying their pitch and visualizing harmonics. It helps musicians refine their playing technique by showing accuracy to pitch and the subtle differences in instrument sound through harmonic analysis. It requires microphone access and a quiet environment for optimal performance.

**Highlights:** Monophonic pitch detection, Note and harmonic visualization, Playing technique fine-tuning, Harmonic analysis of instruments, Practice aid for scales, Adjustable sensitivity slider

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small tip | $0.49 | one-time |
| Medium tip | $1.99 | one-time |
| Large tip | $3.99 | one-time |


### Three9x

[App page](https://appshunter.io/ios/app/three9x/id6782750722)

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

**In-app purchases:** none


## Frequently asked questions

### Is Visualised Audio free?

Visualised Audio is free to download, with in-app purchases available.

### Is Three9x free?

Three9x is free to download, with no in-app purchases.

### Do Visualised Audio or Three9x have ads?

Neither Visualised Audio nor Three9x shows ads.

### Which is updated more often, Visualised Audio or Three9x?

Visualised Audio ships an update every 14 months, and Three9x every 5 weeks. Most recently, Visualised Audio was updated on October 8, 2026 and Three9x on October 2, 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.*