# Derby.io vs Cat Tower Defence

The clearest difference is rating: Derby.io at 2.8 against Cat Tower Defence's 1.0. Derby.io also leads on ratings volume (5 vs 1) and iOS requirement (8.0 vs 12.0). Cat Tower Defence's advantage is update cadence (daily vs monthly). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Derby.io holds the better App Store score, 2.8 against 1.0. 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 split almost evenly too, at 0% and 0% positive.

Derby.io ships an update monthly, Cat Tower Defence daily. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Derby.io | Cat Tower Defence |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.8 (5 ratings)](https://appshunter.io/ios/app/derbyio/id1439451311/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/cat-tower-defence/id6458741319/reviews) |
| Number of ratings | **5** | 1 |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Daily** |
| Monetization | Free | Free |
| Size | 108 MB | 127 MB |
| Requires iOS | **8.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 12+ |
| Developer | [Entity3 Limited](https://appshunter.io/developer/1055360372) | [Kevin Ghori](https://appshunter.io/developer/1639082610) |

## 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


### Cat Tower Defence

[App page](https://appshunter.io/ios/app/cat-tower-defence/id6458741319)

Defend your territory and expand your feline empire in this strategy game. Unlock and upgrade powerful machines, enhance your cat's abilities, and battle enemy cats to conquer new lands. Can you outwit your opponents and become the ultimate cat commander?

**Highlights:** Defend and expand territory, Unlock and upgrade machines, Enhance cat speed and fire-rate, Battle enemy cats, Conquer new territories

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Derby.io free?

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

### Is Cat Tower Defence free?

Cat Tower Defence is free to download, with no in-app purchases.

### Which has better reviews, Derby.io or Cat Tower Defence?

Derby.io is rated higher. Derby.io averages 2.8 out of 5 from 5 ratings, while Cat Tower Defence averages 1.0 from 1 ratings.

### Do Derby.io or Cat Tower Defence have ads?

Neither Derby.io nor Cat Tower Defence shows ads.

### Which is updated more often, Derby.io or Cat Tower Defence?

Derby.io ships an update monthly, and Cat Tower Defence daily. Most recently, Derby.io was updated on November 2, 2026 and Cat Tower Defence on November 3, 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.*