# MathZombie! vs Slowdial

The clearest difference is in-app purchases: MathZombie! at none against Slowdial's 1. MathZombie! also leads on iOS requirement (15.0 vs 17.0). Slowdial's advantage is ads (none vs shown) and update cadence (weekly vs every 2 months). On price and device support there is nothing between them.

Both are free to download. Slowdial sells 1 one-off in-app purchase. MathZombie! asks for nothing beyond the download.

MathZombie! ships an update every 2 months, Slowdial weekly. Both last shipped on October 22, 2026.

## The numbers

| Metric | MathZombie! | Slowdial |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Ad-supported | — |
| Size | 179 MB | 4 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [M kajimura](https://appshunter.io/developer/1138663828) | [Minari Taniguchi](https://appshunter.io/developer/6796972156) |

## What reviewers say

### MathZombie!

[App page](https://appshunter.io/ios/app/mathzombie/id1537760395)

Engage in a brain-training calculation game to defeat zombies with mental arithmetic. Solve addition, subtraction, and multiplication problems to progress through increasingly difficult stages and compete on global leaderboards. Practice makes perfect for faster calculations.

**Highlights:** Mental arithmetic training, Addition, subtraction, multiplication, Progressive difficulty levels, In-game coin collection, Global and net rankings, Bluetooth keyboard support

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

**In-app purchases:** none


### Slowdial

[App page](https://appshunter.io/ios/app/slowdial-visual-timer/id6816011464)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Slowdial Pro | $7.99 | one-time |


## Frequently asked questions

### Is MathZombie! free?

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

### Is Slowdial free?

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

### Do MathZombie! or Slowdial have ads?

MathZombie! shows ads; Slowdial does not.

### Which is updated more often, MathZombie! or Slowdial?

MathZombie! ships an update every 2 months, and Slowdial weekly. Most recently, MathZombie! was updated on October 22, 2026 and Slowdial on October 22, 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.*