# ESP Challenge vs Zener Game

The clearest difference is iOS requirement: ESP Challenge at 15.6 against Zener Game's 17.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | ESP Challenge | Zener Game |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Size | 6 MB | 14 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Alper Ozdil](https://appshunter.io/developer/1882639147) | [Andrea Pedroni](https://appshunter.io/developer/1894272387) |

## What reviewers say

### ESP Challenge

[App page](https://appshunter.io/ios/app/esp-challenge/id6760099834)

**In-app purchases:** none


### Zener Game

[App page](https://appshunter.io/ios/app/zener-game/id6762470025)

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

**In-app purchases:** none


## Frequently asked questions

### Is ESP Challenge free?

ESP Challenge is free to download, with no in-app purchases.

### Is Zener Game free?

Zener Game is free to download, with no in-app purchases.

### Do ESP Challenge or Zener Game have ads?

Neither ESP Challenge nor Zener Game shows ads.

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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.*