# Derby.io vs Castle Smash!

The clearest difference is review sentiment: Castle Smash! at 100% against Derby.io's 0%. Castle Smash! also leads on rating (5.0 vs 2.8) and update cadence (daily vs monthly). Derby.io's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Castle Smash! sells 1 one-off in-app purchase. Derby.io asks for nothing beyond the download.

Castle Smash! holds the better App Store score, 5.0 against 2.8. That said, the two scores are not equally well evidenced: Derby.io has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of Derby.io's written reviews are positive against 100% of Castle Smash!'s.

Derby.io ships an update monthly, Castle Smash! daily. The most recent releases landed on October 8, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Derby.io | Castle Smash! |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.8 (5 ratings)](https://appshunter.io/ios/app/derbyio/id1439451311/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/castle-smash/id6463717210/reviews)** |
| Number of ratings | **5** | 1 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Daily** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 108 MB | 1.7 GB |
| Requires iOS | **8.0** | 15.2 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [Entity3 Limited](https://appshunter.io/developer/1055360372) | [Funrox Games LTD](https://appshunter.io/developer/1483354183) |

## What reviewers say

### Derby.io

[App page](https://appshunter.io/ios/app/derbyio/id1439451311)

Engage in chaotic demolition derby action where the goal is to survive as long as possible. Dodge, smash, and destroy opponents in a competitive arena to become the ultimate champion.

**Highlights:** Survival gameplay, Player destruction, Competitive arena, Dodge and smash mechanics, Multiplayer action

**In-app purchases:** none


### Castle Smash!

[App page](https://appshunter.io/ios/app/castle-smash/id6463717210)

Engage in a physics-based demolition game where you can tear down hundreds of castles. Experience massive destruction with realistic physics and frantic gameplay. Try this free-to-play experience with over 80 unique castles to destroy.

**Highlights:** Massive destruction physics, Hundreds of castles to smash, Frantic demolition gameplay, Over 80 unique levels, Free-to-play

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NO ADS | $2.99 | one-time |


## Frequently asked questions

### Is Derby.io free?

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

### Is Castle Smash! free?

Castle Smash! is free to download, with in-app purchases available.

### Which has better reviews, Derby.io or Castle Smash!?

Castle Smash! is rated higher. Derby.io averages 2.8 out of 5 from 5 ratings, while Castle Smash! averages 5.0 from 1 ratings.

### Do Derby.io or Castle Smash! have ads?

Castle Smash! shows ads; Derby.io does not.

### Which is updated more often, Derby.io or Castle Smash!?

Derby.io ships an update monthly, and Castle Smash! daily. Most recently, Derby.io was updated on October 8, 2026 and Castle Smash! on October 24, 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.*