# Zener , The original ESP Test vs Chess Notation Mini Game

The clearest difference is update cadence: Chess Notation Mini Game at every 2 days against Zener , The original ESP Test's every 5 months. Zener , The original ESP Test's advantage is iOS requirement (15.6 vs 17.6). 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.

Zener , The original ESP Test ships an update every 5 months, Chess Notation Mini Game every 2 days. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Zener , The original ESP Test | Chess Notation Mini Game |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (3 ratings)](https://appshunter.io/ios/app/zener-the-original-esp-test/id999867194/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 days** |
| Monetization | Free | — |
| Size | 3 MB | 48 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ioannis Gkortsos](https://appshunter.io/developer/945744733) | [Maximiliano Valdez Gonzalez](https://appshunter.io/developer/1878599165) |

## What reviewers say

### Zener , The original ESP Test

[App page](https://appshunter.io/ios/app/zener-the-original-esp-test/id999867194)

Experience the classic extrasensory perception test as originally designed by Karl Zener. Choose a card from a deck of five symbols and attempt to guess the selected card.

**Highlights:** Original ESP test simulation, Five distinct symbols, Sender and receiver roles, Classic psychological experiment

**Features:** macOS Compatibility

**In-app purchases:** none


### Chess Notation Mini Game

[App page](https://appshunter.io/ios/app/chess-notation-mini-game/id6763933009)

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

**In-app purchases:** none


## Frequently asked questions

### Is Zener , The original ESP Test free?

Zener , The original ESP Test is free to download, with no in-app purchases.

### Is Chess Notation Mini Game free?

Chess Notation Mini Game is free to download, with no in-app purchases.

### Do Zener , The original ESP Test or Chess Notation Mini Game have ads?

Neither Zener , The original ESP Test nor Chess Notation Mini Game shows ads.

### Which is updated more often, Zener , The original ESP Test or Chess Notation Mini Game?

Zener , The original ESP Test ships an update every 5 months, and Chess Notation Mini Game every 2 days. Most recently, Zener , The original ESP Test was updated on November 1, 2026 and Chess Notation Mini Game on November 5, 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.*