# BK vs KORG Module

The clearest difference is rating: KORG Module at 4.6 against BK's 3.7. KORG Module also leads on update cadence (monthly vs every 9 months) and ratings volume (783 vs 3). BK's advantage is in-app purchases (none vs 21) and iOS requirement (8.1 vs 15.6). On price and ads there is nothing between them.

Both are free to download. KORG Module sells 21 one-off in-app purchases. BK asks for nothing beyond the download.

KORG Module holds the better App Store score, 4.6 against 3.7. That said, the two scores are not equally well evidenced: KORG Module has 783 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 33% of BK's written reviews are positive against 52% of KORG Module's.

BK ships an update every 9 months, KORG Module monthly. The most recent releases landed on October 8, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | BK | KORG Module |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/bk-9-performance-editor/id668979731/reviews) | **[4.6 (783 ratings)](https://appshunter.io/ios/app/korg-module/id1048875111/reviews)** |
| Number of ratings | 3 | **783** |
| Positive reviews | 33.3% of reviews | **51.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 22 MB | 1.7 GB |
| Requires iOS | **8.1** | 15.6 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Roland Corporation](https://appshunter.io/developer/387333694) | [KORG INC.](https://appshunter.io/developer/363714046) |

## What reviewers say

### BK

[App page](https://appshunter.io/ios/app/bk-9-performance-editor/id668979731)

Control and edit the real-time performance parameters of your Roland BK-9 Backing Keyboard directly from your iPad. Enhance your playing, practicing, and composing experience with quick access to tone editing, part mixing, and effects.

**Highlights:** Real-time parameter editing, Tone editing, Part mixing control, Effects adjustment, iPad touchscreen interface, Enhanced performance tool

**In-app purchases:** none


### KORG Module

[App page](https://appshunter.io/ios/app/korg-module/id1048875111)

This app offers professional piano and keyboard sounds for mobile devices. The free version provides access to high-quality piano sounds, with options to unlock more sound libraries and features through in-app purchases or by connecting Korg MIDI controllers.

**Highlights:** High-quality piano and keyboard sounds, Customizable sound sets with over 30 libraries, AUv3 support, Ultra-low latency sound engine, Unlock sounds with Korg MIDI controllers

**Features:** Family Sharing

**In-app purchases (21)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 7-day trial:TRITON Best select | Free | one-time |
| 7-day trial : Organ & Clav | Free | one-time |
| 7-day trial : Module Perf Exp | Free | one-time |
| 7-day trial : Ivory Grand | Free | one-time |
| 7-day trial : Ivory American D | Free | one-time |
| 7-day trial:Essential Complete | Free | one-time |
| 7-day trial Hybrid 2 | Free | one-time |
| 7-day trial : 80s Dance Pop | Free | one-time |
| 7-day Trial : GENERAL 128 | Free | one-time |
| 7-day trial : OASYS Piano | Free | one-time |
| 7-day Trial: M1 Best Selection | Free | one-time |
| 7-day Trial : Wild Kits | Free | one-time |
| 7-day Trial : Neo Soul | Free | one-time |
| 7-day trial : 80's E.Piano | Free | one-time |
| 7-day Trial : Classic EP-88M | Free | one-time |
| 7-day trial : Dreamy Synths | Free | one-time |
| Hybrid Synth Pack 2 | $4.99 | one-time |
| Space Western | $6.99 | one-time |
| TRITON Best Selection | $9.99 | one-time |
| Essential Complete | $19.99 | one-time |
| Module Performance Expansion | $29.99 | one-time |

**What reviewers like**

- 🎹 Great sounds and interface
- 🎨 Realistic piano and organ sounds
- 💻 Works well as an AUv3 plugin
- 🔍 Helpful as a teaching tool
- 🎚️ Excellent sound quality and options

**What reviewers complain about**

- 🔁 Frequent need to restore purchases
- ⚠️ Compatibility issues with Korg hardware
- 🔒 Confusing purchase options and restrictions
- 🔋 Causes device heating issues
- 🔇 Low volume compared to other apps

**Reported bugs**

- Purchased sounds disappearing after updates
- Inability to delete individual modules to save space
- Inconsistent behavior with Bluetooth MIDI controllers
- Crashes when using certain expansion packs

**Requested features**

- Add virtual pitch bend and modulation wheels
- Improve Gadget integration and availability of IAPs
- Implement AUv3 support for better integration
- Provide a more intuitive and streamlined interface
- Add more instrument categories like brass, woodwinds, and Latin percussion


## Frequently asked questions

### Is BK free?

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

### Is KORG Module free?

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

### Which has better reviews, BK or KORG Module?

KORG Module is rated higher. BK averages 3.7 out of 5 from 3 ratings, while KORG Module averages 4.6 from 783 ratings.

### Do BK or KORG Module have ads?

Neither BK nor KORG Module shows ads.

### Which is updated more often, BK or KORG Module?

BK ships an update every 9 months, and KORG Module monthly. Most recently, BK was updated on October 8, 2026 and KORG Module on October 9, 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.*