# RainbowStar vs 教城教師

The clearest difference is in-app purchases: 教城教師 at none against RainbowStar's 6. 教城教師 also leads on update cadence (every 3 weeks vs every 5 weeks). RainbowStar's advantage is iOS requirement (12.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. RainbowStar sells 6 one-off in-app purchases. 教城教師 asks for nothing beyond the download.

RainbowStar ships an update every 5 weeks, 教城教師 every 3 weeks. The most recent releases landed on October 11, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | RainbowStar | 教城教師 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Size | 287 MB | 37 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Open Knowledge Association Ltd.](https://appshunter.io/developer/868011308) | [Hong Kong Education City Limited](https://appshunter.io/developer/672104764) |

## What reviewers say

### RainbowStar

[App page](https://appshunter.io/ios/app/rainbowstar/id1251256553)

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 8個金幣 | $0.99 | one-time |
| 48個金幣 | $5.99 | one-time |
| 98個金幣 | $12.99 | one-time |
| 218個金幣 | $27.99 | one-time |
| 368個金幣 | $46.99 | one-time |
| 688個金幣 | $89.99 | one-time |


### 教城教師

[App page](https://appshunter.io/ios/app/id1664047385)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is RainbowStar free?

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

### Is 教城教師 free?

教城教師 is free to download, with no in-app purchases.

### Do RainbowStar or 教城教師 have ads?

Neither RainbowStar nor 教城教師 shows ads.

### Which is updated more often, RainbowStar or 教城教師?

RainbowStar ships an update every 5 weeks, and 教城教師 every 3 weeks. Most recently, RainbowStar was updated on October 11, 2026 and 教城教師 on October 2, 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.*