Comparison

BK vs KORG Module

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

BK

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
Read full description

Use the Apple iPad to display and edit the real-time performance parameters of your Roland BK-9 Backing Keyboard. With the BK-9 Performance Editor, you can use your iPad to directly access the BK-9’s real-time performance parameters as you play the keyboard. Via the iPad’s graphic display and large touchscreen, you have quick and convenient control of a wide selection of parameters, including tone editing, part mixing, effects, and much more. Designed for use alongside the keyboard’s own dual display system and extensive onboard controls, the BK-9 Performance Editor gives you a powerful tool for enhancing your BK-9 experience while performing, practicing, and composing. Communication between the BK-9 and iPad requires either of the following: - Apple iPad Camera Connection Kit (made by Apple Inc.) and a standard USB cable (Type-A male to Type-B male, readily available at retailers that sell computer accessories) - Roland WNA1100-RL Wireless USB Adapter (connected to the BK-9) and a wireless LAN access point with an Internet connection. - BK-9 Version 1.06 or later (available as a free download from the Roland website) is required in order to use this app with the BK-9.

About

KORG Module

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
Read full description

The best sounds, available to everyone. FREE version lets you experience the high-quality piano & keyboard sound. Announcing a new high-quality mobile sound module app for iOS! • KORG Module Pro (Full version): Achieved the #1 position on Ideal for performance and music production, KORG Module is a high-quality sound module app for iOS that contains a professional sound library. With just your iPad/iPhone and a MIDI keyboard such as the KORG microKEY, you can play studio-quality keyboard and grand piano sounds anywhere. FEATURE HIGHLIGHTS ● With just an iPad/iPhone and the new microKEY, you can enjoy great sound anywhere ● Stunningly high-quality piano for free. ● Customize your sound set: Available over 30 sound libraries from the Store page. ● AUv3 support ● Ultra-low latency sound engine ● Unlock additional 4 sounds by connecting Korg MIDI controllers/synthesizers. Check the details from www.korg.com/bundle. More info at https://www.korg.com/products/software/korg_module/ !

Screenshots

KORG Module4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard8 real differences · 2 level
BK versus KORG Module: the parameters behind the verdict, then further details
ParameterBKKORG Module
PriceFreeFree
Rating3.7 (3 ratings)4.6 (783 ratings) — better
Positive reviews33.3% of reviews51.7% of reviews — better
Number of ratings3783 — better
Update frequencyEvery 9 monthsMonthly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPadiPhone, iPad, iPod — better
Requires iOS8.1 — better15.6
Further details — not scored
Size22 MB1.7 GB
Age rating4+4+
DeveloperRoland CorporationKORG INC.

Customer experience

BK

All ratings3 ratings
Positive33.3%
Neutral66.7%
Negative0.0%
Written reviews3 reviews
Positive33.3%
Neutral66.7%
Negative0.0%

KORG Module

All ratings783 ratings
Positive88.6%
Neutral4.3%
Negative7.0%
Written reviews261 reviews
Positive51.7%
Neutral12.3%
Negative36.0%

Bugs and requests

BK

Not enough reviews yet to summarise bugs or requests.

KORG Module

Reported bugs

4 issues
  • 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

5 requests
  • 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

In-app purchases

None

BK

No in-app purchases

21 purchases

KORG Module

One-time21
  • 7-day trial:TRITON Best selectFree
  • 7-day trial : Organ & ClavFree
  • 7-day trial : Module Perf ExpFree
Show 18 more
  • 7-day trial : Ivory GrandFree
  • 7-day trial : Ivory American DFree
  • 7-day trial:Essential CompleteFree
  • 7-day trial Hybrid 2Free
  • 7-day trial : 80s Dance PopFree
  • 7-day Trial : GENERAL 128Free
  • 7-day trial : OASYS PianoFree
  • 7-day Trial: M1 Best SelectionFree
  • 7-day Trial : Wild KitsFree
  • 7-day Trial : Neo SoulFree
  • 7-day trial : 80's E.PianoFree
  • 7-day Trial : Classic EP-88MFree
  • 7-day trial : Dreamy SynthsFree
  • Hybrid Synth Pack 2$4.99
  • Space Western$6.99
  • TRITON Best Selection$9.99
  • Essential Complete$19.99
  • Module Performance Expansion$29.99

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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