# 81 Rush vs Increment

The clearest difference is rating: Increment at 5.0 against 81 Rush's 4.2. Increment also leads on update cadence (daily vs fortnightly). 81 Rush's advantage is monetization model (free vs free with in-app purchases) and ratings volume (31 vs 1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 81 Rush sells 3 one-off in-app purchases and Increment sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Increment holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: 81 Rush has 31 ratings behind it against 1, so its average is the more settled of the two.

81 Rush ships an update fortnightly, Increment daily. The most recent releases landed on October 1, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | 81 Rush | Increment |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (31 ratings)](https://appshunter.io/ios/app/81-rush/id881743883/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/increment-mental-math/id6791279337/reviews)** |
| Number of ratings | **31** | 1 |
| Positive reviews | 57.1% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Fortnightly | **Daily** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 129 MB | 6 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Hoang Phan](https://appshunter.io/developer/881747886) | [SSGM LLC](https://appshunter.io/developer/6791279339) |

## 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 |


### Increment

[App page](https://appshunter.io/ios/app/increment-mental-math/id6791279337)

This arcade-style game challenges your reflexes and speed with arithmetic puzzles. Transform numbers based on instructions before the timer expires. Compete with friends in real-time races or tackle daily challenges.

**Highlights:** Arcade-style arithmetic puzzles, Real-time 1v1 friend races, Daily shared puzzles, Classic mode with streaks and leaderboards, Player profile with avatar and stats, One-handed play design

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is 81 Rush free?

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

### Is Increment free?

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

### Which has better reviews, 81 Rush or Increment?

Increment is rated higher. 81 Rush averages 4.2 out of 5 from 31 ratings, while Increment averages 5.0 from 1 ratings.

### Do 81 Rush or Increment have ads?

Both 81 Rush and Increment show ads.

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

81 Rush ships an update fortnightly, and Increment daily. Most recently, 81 Rush was updated on October 1, 2026 and Increment on October 11, 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.*