# Audio Visualize vs K

The clearest difference is price: Audio Visualize at Free against K's $9.99. Audio Visualize also leads on update cadence (every 2 days vs every 4 weeks) and ratings volume (9 vs 1). K's advantage is rating (5.0 vs 3.6) and review sentiment (100% vs 62%). On device support there is nothing between them.

Audio Visualize is free to download; K costs $9.99 up front. Audio Visualize sells 3 in-app purchases, starting at $1.99 per 7 days. K asks for nothing beyond the download.

K holds the better App Store score, 5.0 against 3.6. That said, the two scores are not equally well evidenced: Audio Visualize has 9 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 62% of Audio Visualize's written reviews are positive against 100% of K's.

Audio Visualize ships an update every 2 days, K every 4 weeks. The most recent releases landed on October 8, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Audio Visualize | K |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | [3.6 (9 ratings)](https://appshunter.io/ios/app/audio-visualize/id1665811859/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/k-air-midi/id6449266659/reviews)** |
| Number of ratings | **9** | 1 |
| Positive reviews | 61.5% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 days** | Every 4 weeks |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 96 MB | 6 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [博 彭](https://appshunter.io/developer/1293268076) | [Stephane Villeneuve](https://appshunter.io/developer/1687514617) |

## What reviewers say

### Audio Visualize

[App page](https://appshunter.io/ios/app/audio-visualize/id1665811859)

Transform your music listening into a vibrant visual experience. This app creates dynamic displays of waveforms, spectrums, and patterns that pulse with your music's rhythm. Perfect for music lovers who want to see their favorite songs come to life.

**Highlights:** Dynamic music visualization, Customizable waveforms, Vibrant spectrum displays, Pulsating patterns, Transforms listening into sensory experience

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $1.99 | per 7 days |
| Monthly Subscription | $3.99 | per month |
| Pro User | $9.99 | one-time |


### K

[App page](https://appshunter.io/ios/app/k-air-midi/id6449266659)

Control your BOSS Katana Air amp and MIDI-capable pedals with this app. Select presets, adjust effects, and map MIDI CC codes for a full touch interface. Save, export, and import your settings for seamless live performance.

**Highlights:** Preset selection and retrieval, Adjustable effect levels and toggles, Tap tempo for delays, Gain, Volume, and EQ controls, Assignable MIDI CC mapping, Save, export, and import presets, Bluetooth device discovery

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Audio Visualize free?

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

### Is K free?

K costs $9.99, with no in-app purchases.

### Which has better reviews, Audio Visualize or K?

K is rated higher. Audio Visualize averages 3.6 out of 5 from 9 ratings, while K averages 5.0 from 1 ratings.

### Do Audio Visualize or K have ads?

Audio Visualize shows ads; K does not.

### Which is updated more often, Audio Visualize or K?

Audio Visualize ships an update every 2 days, and K every 4 weeks. Most recently, Audio Visualize was updated on October 8, 2026 and K on October 15, 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.*