# iAddThree vs The Math Zombie

The clearest difference is price: iAddThree at Free against The Math Zombie's $0.99. iAddThree also leads on update cadence (every 3 weeks vs every 66 months) and rating (5.0 vs 4.8). The Math Zombie's advantage is in-app purchases (none vs 1) and ads (none vs shown). On review sentiment and device support there is nothing between them.

iAddThree is free to download; The Math Zombie costs $0.99 up front. iAddThree sells 1 one-off in-app purchase. The Math Zombie asks for nothing beyond the download.

iAddThree holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 1 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

iAddThree ships an update every 3 weeks, The Math Zombie every 66 months. The most recent releases landed on September 10, 2026 and August 18, 2026 respectively.

## The numbers

| Metric | iAddThree | The Math Zombie |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/iaddthree/id1389962750/reviews)** | [4.8 (4 ratings)](https://appshunter.io/ios/app/the-math-zombie/id1513661978/reviews) |
| Number of ratings | 1 | **4** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 66 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 30 MB | 47 MB |
| Requires iOS | 17.0 | **13.2** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nikolai Nobadi](https://appshunter.io/developer/1330360753) | [MM&F Software LLC](https://appshunter.io/developer/1498948648) |

## What reviewers say

### iAddThree

[App page](https://appshunter.io/ios/app/iaddthree/id1389962750)

Engage your mind with a unique math game that challenges your focus and cognitive abilities. The objective is to add three to each number presented, with a special rule where numbers wrap around to zero instead of forming double digits. This simple yet effective exercise provides a mental workout.

**Highlights:** Cognitive training, Focus improvement, Unique math rules, Brain exercise, High score challenges

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


### The Math Zombie

[App page](https://appshunter.io/ios/app/the-math-zombie/id1513661978)

Engage your brain with a fun math game where you defeat zombies by merging number blocks to create target sums. Improve your math skills and memory in just a few minutes a day.

**Highlights:** Merge number blocks, Solve math problems, Improve math skills, Increase memory ability, Brain training game, Timed challenges

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iAddThree free?

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

### Is The Math Zombie free?

The Math Zombie costs $0.99, with no in-app purchases.

### Which has better reviews, iAddThree or The Math Zombie?

iAddThree is rated higher. iAddThree averages 5.0 out of 5 from 1 ratings, while The Math Zombie averages 4.8 from 4 ratings.

### Do iAddThree or The Math Zombie have ads?

iAddThree shows ads; The Math Zombie does not.

### Which is updated more often, iAddThree or The Math Zombie?

iAddThree ships an update every 3 weeks, and The Math Zombie every 66 months. Most recently, iAddThree was updated on September 10, 2026 and The Math Zombie on August 18, 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.*