# Math Invader vs Zombie Train

The clearest difference is in-app purchases: Zombie Train at none against Math Invader's 2. Zombie Train also leads on update cadence (daily vs every 14 months) and iOS requirement (12.0 vs 16.0). Math Invader's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Math Invader sells 2 one-off in-app purchases. Zombie Train asks for nothing beyond the download.

Math Invader ships an update every 14 months, Zombie Train daily. Both last shipped on October 27, 2026.

## The numbers

| Metric | Math Invader | Zombie Train |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/math-invader/id1539336630/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 14 months | **Daily** |
| Size | 25 MB | 130 MB |
| Requires iOS | 16.0 | **12.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Torben Toepper](https://appshunter.io/developer/633701843) | [Danylo Olegovych Slupsky, FOP](https://appshunter.io/developer/1287008644) |

## What reviewers say

### Math Invader

[App page](https://appshunter.io/ios/app/math-invader/id1539336630)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Extra Pack | $0.99 | one-time |
| Spaceship Pack | $1.99 | one-time |


### Zombie Train

[App page](https://appshunter.io/ios/app/zombie-train-idle-game/id6738581066)

**In-app purchases:** none


## Frequently asked questions

### Is Math Invader free?

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

### Is Zombie Train free?

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

### Do Math Invader or Zombie Train have ads?

Zombie Train shows ads; Math Invader does not.

### Which is updated more often, Math Invader or Zombie Train?

Math Invader ships an update every 14 months, and Zombie Train daily. Most recently, Math Invader was updated on October 27, 2026 and Zombie Train on October 27, 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.*