# CAD HD vs Central Station

The clearest difference is price: CAD HD at Free against Central Station's $4.99. CAD HD also leads on rating (2.4 vs 1.0) and review sentiment (26% vs 0%). Central Station's advantage is in-app purchases (none vs 1) and ads (none vs shown). On ratings volume and device support there is nothing between them.

CAD HD is free to download; Central Station costs $4.99 up front. CAD HD sells 1 one-off in-app purchase. Central Station asks for nothing beyond the download.

CAD HD holds the better App Store score, 2.4 against 1.0. Both are backed by a comparable volume of ratings — 5 and 2 respectively. Written reviews point the same way: 26% of CAD HD's written reviews are positive against 0% of Central Station's.

CAD HD ships an update every 5 months, Central Station every 3 weeks. Both last shipped on October 21, 2026.

## The numbers

| Metric | CAD HD | Central Station |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[2.4 (5 ratings)](https://appshunter.io/ios/app/cad-hd/id998042409/reviews)** | [1.0 (2 ratings)](https://appshunter.io/ios/app/central-station/id1580801950/reviews) |
| Number of ratings | **5** | 2 |
| Positive reviews | **26.1% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 23 MB | 3 MB |
| Requires iOS | **14.1** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple TV |
| Age rating | 4+ | 4+ |
| Developer | [JIN HWAN KIM](https://appshunter.io/developer/576623931) | [Position Games Limited](https://appshunter.io/developer/376156252) |

## What reviewers say

### CAD HD

[App page](https://appshunter.io/ios/app/cad-hd/id998042409)

Create intricate patterns and digital art with a variety of professional coloring styles. The generated images are suitable for use in designs, reports, social media, and documents. Enjoy a relaxing and creative digital experience on your iPhone and iPad.

**Highlights:** Professional coloring styles, Pattern and paint creation, Zoom-in and zoom-out for detail, Smooth visual effects, Pinch and stretch gestures for zoom, Tap and swipe editing

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| upgrade to pro | $3.99 | one-time |


### Central Station

[App page](https://appshunter.io/ios/app/central-station/id1580801950)

Connect to a model train control system to view and share track layouts. Control locomotives, monitor signals, and see community-shared designs. No physical device is required to participate.

**Highlights:** View track layouts, Upload and share layouts, Browse community layouts, Control locomotives, Monitor signals and switches, Real-time updates

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

**In-app purchases:** none


## Frequently asked questions

### Is CAD HD free?

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

### Is Central Station free?

Central Station costs $4.99, with no in-app purchases.

### Which has better reviews, CAD HD or Central Station?

CAD HD is rated higher. CAD HD averages 2.4 out of 5 from 5 ratings, while Central Station averages 1.0 from 2 ratings.

### Do CAD HD or Central Station have ads?

CAD HD shows ads; Central Station does not.

### Which is updated more often, CAD HD or Central Station?

CAD HD ships an update every 5 months, and Central Station every 3 weeks. Most recently, CAD HD was updated on October 21, 2026 and Central Station on October 21, 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.*