# Chairo vs Number Knights

The clearest difference is in-app purchases: Chairo at none against Number Knights's 3. Chairo also leads on iOS requirement (13.0 vs 15.0). Number Knights's advantage is update cadence (every 2 days vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. Number Knights sells 3 in-app purchases, starting at $1.99 per month. Chairo asks for nothing beyond the download.

Chairo ships an update every 2 months, Number Knights every 2 days. The most recent releases landed on October 9, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Chairo | Number Knights |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 days** |
| Size | 28 MB | 101 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [WARRAGUL DISTRICT PARENT CONTROLLED CHRISTIAN SCHOOL ASSOCIATION INC](https://appshunter.io/developer/1427135171) | [Ace-Games](https://appshunter.io/developer/1822117959) |

## What reviewers say

### Chairo

[App page](https://appshunter.io/ios/app/chairo/id1427135172)

**Features:** macOS Compatibility

**In-app purchases:** none


### Number Knights

[App page](https://appshunter.io/ios/app/number-knights-math-rpg/id6789536084)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| English | $1.99 | per month |
| English | $12.99 | per year |
| English | $19.99 | one-time |


## Frequently asked questions

### Is Chairo free?

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

### Is Number Knights free?

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

### Do Chairo or Number Knights have ads?

Neither Chairo nor Number Knights shows ads.

### Which is updated more often, Chairo or Number Knights?

Chairo ships an update every 2 months, and Number Knights every 2 days. Most recently, Chairo was updated on October 9, 2026 and Number Knights on October 11, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*