# 81 Rush vs Math5

The clearest difference is in-app purchases: Math5 at none against 81 Rush's 3. Math5 also leads on ads (none vs shown) and update cadence (every 4 days vs fortnightly). On price and device support there is nothing between them.

Both are free to download. 81 Rush sells 3 one-off in-app purchases. Math5 asks for nothing beyond the download.

81 Rush ships an update fortnightly, Math5 every 4 days. The most recent releases landed on October 1, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | 81 Rush | Math5 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (31 ratings)](https://appshunter.io/ios/app/81-rush/id881743883/reviews)** | — |
| Number of ratings | **31** | — |
| Positive reviews | 57.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 4 days** |
| Monetization | Free | — |
| Size | 129 MB | 22 MB |
| Requires iOS | 17.0 | **8.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hoang Phan](https://appshunter.io/developer/881747886) | [Nhat Tran](https://appshunter.io/developer/1077977187) |

## What reviewers say

### 81 Rush

[App page](https://appshunter.io/ios/app/81-rush/id881743883)

A 9x9 board puzzle game where players tap numbers from 1 to 81 in ascending order. It requires focus, speed, and memory to achieve high scores.

**Highlights:** 9x9 board puzzle, Tap numbers 1-81, Ascending order gameplay, Focus and speed challenge, High score pursuit

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ad-Free Pass · 1 Month | $0.99 | one-time |
| Ad-Free Pass · 3 Months | $1.99 | one-time |
| No more Ads | $9.99 | one-time |


### Math5

[App page](https://appshunter.io/ios/app/math5-quiz-maths-crack-brain/id1434962126)

**In-app purchases:** none


## Frequently asked questions

### Is 81 Rush free?

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

### Is Math5 free?

Math5 is free to download, with no in-app purchases.

### Do 81 Rush or Math5 have ads?

81 Rush shows ads; Math5 does not.

### Which is updated more often, 81 Rush or Math5?

81 Rush ships an update fortnightly, and Math5 every 4 days. Most recently, 81 Rush was updated on October 1, 2026 and Math5 on October 10, 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.*