# ULTIMIDI vs KG

The clearest difference is in-app purchases: KG at none against ULTIMIDI's 4. ULTIMIDI's advantage is iOS requirement (15.1 vs 26.5). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. ULTIMIDI sells 4 one-off in-app purchases. KG asks for nothing beyond the download.

ULTIMIDI ships an update every 5 weeks, KG every 3 weeks. The most recent releases landed on October 6, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | ULTIMIDI | KG |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/ultimidi/id6763802168/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 38 MB | 36 MB |
| Requires iOS | **15.1** | 26.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nicholas Hogan](https://appshunter.io/developer/1895496828) | [Kouki Yoshimoto](https://appshunter.io/developer/1884780659) |

## What reviewers say

### ULTIMIDI

[App page](https://appshunter.io/ios/app/ultimidi/id6763802168)

Design custom MIDI touch control surfaces with a free-form canvas. Assign gestures, physics, and automation to faders, knobs, and more. Connect to any MIDI-capable app or hardware for a personalized music creation experience.

**Highlights:** Customizable MIDI touch control surfaces, Free-form canvas for layout design, Assign gesture bindings and automation, Connect to MIDI apps and hardware, Advanced control logic and routing, Cloud saving for controller layouts

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Performance Pack | $25.00 | one-time |
| Stepped Controls Pack | $25.00 | one-time |
| Automation Pack | $25.00 | one-time |
| Standard Upgrade | $50.00 | one-time |


### KG

[App page](https://appshunter.io/ios/app/kg-square-virtual-analog-synth/id6776108274)

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

**In-app purchases:** none


## Frequently asked questions

### Is ULTIMIDI free?

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

### Is KG free?

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

### Do ULTIMIDI or KG have ads?

Neither ULTIMIDI nor KG shows ads.

### Which is updated more often, ULTIMIDI or KG?

ULTIMIDI ships an update every 5 weeks, and KG every 3 weeks. Most recently, ULTIMIDI was updated on October 6, 2026 and KG on October 19, 2026.

---

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