# KORG Module vs Sunday Keys

The clearest difference is in-app purchases: Sunday Keys at none against KORG Module's 21. Sunday Keys also leads on review sentiment (71% vs 52%). KORG Module's advantage is ratings volume (783 vs 115). On price, rating, update cadence and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.6 for KORG Module against 4.6 for Sunday Keys. That said, the two scores are not equally well evidenced: KORG Module has 783 ratings behind it against 115, so its average is the more settled of the two. Written reviews are what separate them: 52% of KORG Module's written reviews are positive against 71% of Sunday Keys's.

KORG Module ships an update monthly, Sunday Keys every 3 weeks. The most recent releases landed on October 16, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | KORG Module | Sunday Keys |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (783 ratings)](https://appshunter.io/ios/app/korg-module/id1048875111/reviews) | [4.6 (115 ratings)](https://appshunter.io/ios/app/sunday-keys/id1615360535/reviews) |
| Number of ratings | **783** | 115 |
| Positive reviews | 51.7% of reviews | **70.9% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 1.7 GB | 201 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [KORG INC.](https://appshunter.io/developer/363714046) | [Loop Community](https://appshunter.io/developer/664688178) |

## What reviewers say

### 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


### Sunday Keys

[App page](https://appshunter.io/ios/app/sunday-keys/id1615360535)

This app provides a comprehensive worship keyboard rig for iPad, allowing users to access and organize their sounds, patches, and setlists. It supports AUv3 instrument plugins and offers powerful audio and MIDI effects for live performance and service preparation.

**Highlights:** AUv3 instrument plugin hosting, Organized sound, patch, and setlist library, Touch-optimized interface, Powerful audio and MIDI effects, Tonic Pad Player for ambient pads, MIDI hardware and Bluetooth support

**In-app purchases:** none

**What reviewers like**

- ✨ High-quality sounds
- 👍 User-friendly interface
- 💡 Innovative AI patch builder
- 🤝 Helpful customer support
- 🚀 Seamless transitions

**What reviewers complain about**

- 💸 High price point
- ⏳ Annual license renewal
- 🤔 Complex registration process
- 🚫 Limited editing of song patches
- ⚠️ Inconsistent drone functionality

**Reported bugs**

- App crashing on iPad
- Drone not working reliably
- Core audio error on iPad
- Sound library installation issues
- App not running on older macOS versions

**Requested features**

- AUv3 plugin support for Logic Pro and GarageBand iOS
- Sampler/looper functionality
- Loop player
- MIDI monitor on main screen displaying chords
- Ability to use third-party plugins


## Frequently asked questions

### Is KORG Module free?

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

### Is Sunday Keys free?

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

### Which has better reviews, KORG Module or Sunday Keys?

KORG Module and Sunday Keys are both rated 4.6 out of 5 on the App Store, from 783 and 115 ratings respectively.

### Do KORG Module or Sunday Keys have ads?

Neither KORG Module nor Sunday Keys shows ads.

### Which is updated more often, KORG Module or Sunday Keys?

KORG Module ships an update monthly, and Sunday Keys every 3 weeks. Most recently, KORG Module was updated on October 16, 2026 and Sunday Keys 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.*