# PMDG CDU DEVICE Pro vs Three Realms

The clearest difference is review sentiment: Three Realms at 100% against PMDG CDU DEVICE Pro's 44%. Three Realms also leads on price (Free vs $7.99) and update cadence (every 2 days vs every 10 months). PMDG CDU DEVICE Pro's advantage is in-app purchases (none vs 5) and device support (3 vs 1). On ads there is nothing between them.

Three Realms is free to download; PMDG CDU DEVICE Pro costs $7.99 up front. Three Realms sells 5 one-off in-app purchases. PMDG CDU DEVICE Pro asks for nothing beyond the download.

PMDG CDU DEVICE Pro ships an update every 10 months, Three Realms every 2 days. The most recent releases landed on October 16, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | PMDG CDU DEVICE Pro | Three Realms |
| --- | --- | --- |
| Price | $7.99 | **Free** |
| Rating | **[2.6 (17 ratings)](https://appshunter.io/ios/app/pmdg-cdu-device-pro/id1104768333/reviews)** | — |
| Number of ratings | **17** | — |
| Positive reviews | 44.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 2 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 33 MB | 119 MB |
| Requires iOS | **8.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Sungbae Cho](https://appshunter.io/developer/1102800511) | [SYDD Studio](https://appshunter.io/developer/6816047413) |

## What reviewers say

### PMDG CDU DEVICE Pro

[App page](https://appshunter.io/ios/app/pmdg-cdu-device-pro/id1104768333)

Wirelessly send CDU data and button inputs from PMDG 737, 747, and 777 aircraft to your flight simulator. Enjoy features like night shift mode and full-screen support for an immersive experience.

**Highlights:** Wireless CDU data transmission, Button input to simulator, Supports PMDG 737, 747, 777, Night shift function, Full screen support, 3D model rendered images

**Features:** Vision Pro support

**In-app purchases:** none


### Three Realms

[App page](https://appshunter.io/ios/app/three-realms/id6816171615)

Experience a grand strategy game where the legends of China, Korea, and Japan clash. Command 18 factions, 244 officers, and legendary skills across a vast map. Enjoy a streamlined, one-handed portrait mode experience designed for mobile.

**Highlights:** Three nations collide: China, Korea, Japan, 18 factions and 76 cities, 244 historical officers, 75 legendary skills and 60 treasures, One-handed portrait mode gameplay, Streamlined turn-based campaign

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Korea Faction Pack | $0.99 | one-time |
| Japan Faction Pack | $0.99 | one-time |
| China Faction Pack | $0.99 | one-time |
| Custom Lord Mode | $0.99 | one-time |
| All Faction Packs + Custom Lord | $2.99 | one-time |


## Frequently asked questions

### Is PMDG CDU DEVICE Pro free?

PMDG CDU DEVICE Pro costs $7.99, with no in-app purchases.

### Is Three Realms free?

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

### Do PMDG CDU DEVICE Pro or Three Realms have ads?

Neither PMDG CDU DEVICE Pro nor Three Realms shows ads.

### Which is updated more often, PMDG CDU DEVICE Pro or Three Realms?

PMDG CDU DEVICE Pro ships an update every 10 months, and Three Realms every 2 days. Most recently, PMDG CDU DEVICE Pro was updated on October 16, 2026 and Three Realms on October 17, 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.*