# Cat Tower Sort vs Number Doragon

The clearest difference is in-app purchases: Cat Tower Sort at none against Number Doragon's 8. Cat Tower Sort also leads on iOS requirement (13.0 vs 18.6). Number Doragon's advantage is ads (none vs shown) and update cadence (every 2 days vs every 2 weeks). On price and device support there is nothing between them.

Both are free to download. Number Doragon sells 8 one-off in-app purchases. Cat Tower Sort asks for nothing beyond the download.

Cat Tower Sort ships an update every 2 weeks, Number Doragon every 2 days. The most recent releases landed on October 3, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Cat Tower Sort | Number Doragon |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Size | 231 MB | 856 MB |
| Requires iOS | **13.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [ACTIONFIT](https://appshunter.io/developer/1516168822) | [Satoshi Yamada](https://appshunter.io/developer/1570646947) |

## What reviewers say

### Cat Tower Sort

[App page](https://appshunter.io/ios/app/cat-tower-sort/id6502568669)

**Features:** macOS Compatibility

**In-app purchases:** none


### Number Doragon

[App page](https://appshunter.io/ios/app/number-doragon/id6760776794)

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 100 Coins | $0.49 | one-time |
| Starter Pack | $1.99 | one-time |
| Double Coins (Forever) | $2.99 | one-time |
| 550 Coins (+10% Bonus) | $2.99 | one-time |
| 1,200 Coins (+20% Bonus) | $5.99 | one-time |
| 3,000 Coins (+50% Bonus) | $11.99 | one-time |
| 8,500 Coins (+70% Bonus) | $29.99 | one-time |
| 22,000 Coins (+120% Bonus) | $59.99 | one-time |


## Frequently asked questions

### Is Cat Tower Sort free?

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

### Is Number Doragon free?

Number Doragon is free to download, with in-app purchases available.

### Do Cat Tower Sort or Number Doragon have ads?

Cat Tower Sort shows ads; Number Doragon does not.

### Which is updated more often, Cat Tower Sort or Number Doragon?

Cat Tower Sort ships an update every 2 weeks, and Number Doragon every 2 days. Most recently, Cat Tower Sort was updated on October 3, 2026 and Number Doragon on October 25, 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.*