# Rainbow Surfer vs Quick Math Challenge!

The clearest difference is in-app purchases: Rainbow Surfer at none against Quick Math Challenge!'s 3. Rainbow Surfer also leads on iOS requirement (13.0 vs 17.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Quick Math Challenge! sells 3 one-off in-app purchases. Rainbow Surfer asks for nothing beyond the download.

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Rainbow Surfer | Quick Math Challenge! |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (28 ratings)](https://appshunter.io/ios/app/rainbow-surfer-duet-color/id6478478379/reviews)** | — |
| Number of ratings | **28** | — |
| Positive reviews | 71.4% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Fortnightly | Fortnightly |
| Monetization | Ad-supported | — |
| Size | 257 MB | 7 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [晗 张](https://appshunter.io/developer/1677246927) | [Alex Lee](https://appshunter.io/developer/1070983855) |

## What reviewers say

### Rainbow Surfer

[App page](https://appshunter.io/ios/app/rainbow-surfer-duet-color/id6478478379)

Guide a character through a rhythm-based game by slashing circles and avoiding different colors. Master the beat to achieve perfect combos and unlock new scenes and items. A challenging yet addictive experience for music and game lovers.

**Highlights:** Finger-drag controls, Rhythm-based gameplay, Color matching challenges, Unlockable scenes and items, Addictive music integration, Simple game control experience

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

**In-app purchases:** none


### Quick Math Challenge!

[App page](https://appshunter.io/ios/app/quick-math-challenge/id6747409960)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10 Slow Timers | $1.99 | one-time |
| 10 Hints | $1.99 | one-time |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is Rainbow Surfer free?

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

### Is Quick Math Challenge! free?

Quick Math Challenge! is free to download, with in-app purchases available.

### Do Rainbow Surfer or Quick Math Challenge! have ads?

Both Rainbow Surfer and Quick Math Challenge! show ads.

### Which is updated more often, Rainbow Surfer or Quick Math Challenge!?

Rainbow Surfer ships an update fortnightly, and Quick Math Challenge! fortnightly. Most recently, Rainbow Surfer was updated on October 24, 2026 and Quick Math Challenge! 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.*