# Zotz! vs Crystal Math

The clearest difference is in-app purchases: Zotz! at none against Crystal Math's 3. Zotz! also leads on ads (none vs shown). Crystal Math's advantage is review sentiment (100% vs 67%) and update cadence (every 2 weeks vs every 11 months). On price, rating and ratings volume there is nothing between them.

Both are free to download. Crystal Math sells 3 one-off in-app purchases. Zotz! asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Zotz! against 5.0 for Crystal Math. Both are backed by a comparable volume of ratings — 4 and 3 respectively. Written reviews are what separate them: 67% of Zotz!'s written reviews are positive against 100% of Crystal Math's.

Zotz! ships an update every 11 months, Crystal Math every 2 weeks. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Zotz! | Crystal Math |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (4 ratings)](https://appshunter.io/ios/app/zotz/id346433833/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/crystal-math-numbers-on-speed/id1261401422/reviews) |
| Number of ratings | **4** | 3 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 11 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 4 MB | 28 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Matt Neuburg](https://appshunter.io/developer/346204863) | [Rafael Kolloch](https://appshunter.io/developer/985182742) |

## What reviewers say

### Zotz!

[App page](https://appshunter.io/ios/app/zotz/id346433833)

This game offers a unique perceptual challenge, training your brain and eyes with a simple card-matching mechanic. Customize colors, fill types, and card layouts to your preference. Enjoy a pressure-free experience with no timer or score.

**Highlights:** Perceptual practice, Brain and eye training, Customizable attributes, No timer or score, Simple card challenge

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

**In-app purchases:** none


### Crystal Math

[App page](https://appshunter.io/ios/app/crystal-math-numbers-on-speed/id1261401422)

This game offers four distinct modes to sharpen your mental arithmetic. Compete against the clock, challenge other players, or practice at your own pace to become a math champion and unlock achievements.

**Highlights:** Daily challenges with leaderboards, Player vs. player duels, 30-second time attack mode, Free exploration mode, Avatar customization, Achievement unlocking

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hipster | $0.99 | one-time |
| Famous | $0.99 | one-time |
| Cinema | $0.99 | one-time |


## Frequently asked questions

### Is Zotz! free?

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

### Is Crystal Math free?

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

### Which has better reviews, Zotz! or Crystal Math?

Zotz! and Crystal Math are both rated 5.0 out of 5 on the App Store, from 4 and 3 ratings respectively.

### Do Zotz! or Crystal Math have ads?

Crystal Math shows ads; Zotz! does not.

### Which is updated more often, Zotz! or Crystal Math?

Zotz! ships an update every 11 months, and Crystal Math every 2 weeks. Most recently, Zotz! was updated on November 1, 2026 and Crystal Math on November 2, 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.*