# RainbowOne vs Less Math 算數 (校園版)

The clearest difference is in-app purchases: Less Math 算數 (校園版) at none against RainbowOne's 6. Less Math 算數 (校園版) also leads on update cadence (every 5 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. RainbowOne sells 6 one-off in-app purchases. Less Math 算數 (校園版) asks for nothing beyond the download.

RainbowOne ships an update every 2 months, Less Math 算數 (校園版) every 5 days. The most recent releases landed on September 8, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | RainbowOne | Less Math 算數 (校園版) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (2 ratings)](https://appshunter.io/ios/app/rainbowone/id1019429184/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 287 MB | 69 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Open Knowledge Association Ltd.](https://appshunter.io/developer/868011308) | [RiteX Ai Technologies Limited](https://appshunter.io/developer/1558355552) |

## What reviewers say

### RainbowOne

[App page](https://appshunter.io/ios/app/rainbowone/id1019429184)

Create and deliver interactive e-learning materials with a powerful e-book editor. Engage students through cross-platform lessons, auto-corrected exercises, and instant learning data analysis. Share and discover educational content in a dedicated bookstore.

**Highlights:** Innovative e-book editor with 80+ tools, Cross-platform interactive lessons, Auto-corrected exercises, Instant learning data analysis, Bookstore for sharing and editing e-books, Class management tools

**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 |


### Less Math 算數 (校園版)

[App page](https://appshunter.io/ios/app/less-math/id6496284077)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RainbowOne free?

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

### Is Less Math 算數 (校園版) free?

Less Math 算數 (校園版) is free to download, with no in-app purchases.

### Do RainbowOne or Less Math 算數 (校園版) have ads?

Neither RainbowOne nor Less Math 算數 (校園版) shows ads.

### Which is updated more often, RainbowOne or Less Math 算數 (校園版)?

RainbowOne ships an update every 2 months, and Less Math 算數 (校園版) every 5 days. Most recently, RainbowOne was updated on September 8, 2026 and Less Math 算數 (校園版) on September 14, 2026.

---

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