---
title: "Zener , The original ESP Test — App Overview"
url: https://marlvel.ai/apps/zener-the-original-esp-test
category: Entertainment
developer: Ioannis Gkortsos
platforms: ios, android
rating: 3.7 (55 ratings)
pricing: free
report_level: overview
generated: 2026-04-30
last_verified: "2026-04-30T11:05:41.897Z"
---

<!-- SECTION: Key Insight -->
> **Key Insight:** The app serves as a niche, historical utility for conducting traditional ESP tests without additional features like score tracking or randomization.

<!-- SECTION: Quick Facts -->
| Metric | Value |
|--------|-------|
| Category | Entertainment |
| Rating | 3.7 ★ (55) |
| Pricing | free |
| Platforms | iOS, Android |
| Latest Version (iOS) | 2.2 |
| Latest Version (Android) | 3.0 |
| Developer | Ioannis Gkortsos |

<!-- SECTION: Summary -->
## What is Zener , The original ESP Test?

Zener is a digital recreation of the 1930s extrasensory perception test developed by Karl Zener. It facilitates a two-person testing environment where a sender concentrates on specific symbols and a receiver attempts to identify them.

<!-- SECTION: Key Features -->
## Key Features

- **Symbol Deck**: Includes the five original Zener symbols: hollow circle, Greek cross, wavy lines, hollow square, and five-pointed star.
- **Two-Person Testing Mode**: Supports a sender-receiver dynamic to simulate the original ESP experimental protocol.

<!-- SECTION: Target Audience -->
## Who is it for?

Individuals interested in parapsychology and historical psychological testing methods.

<!-- SECTION: Links -->
## Links

- [App Store](https://apps.apple.com/us/app/zener-the-original-esp-test/id999867194?uo=4)
- [Google Play](https://play.google.com/store/apps/details?id=appinventor.ai_metaphonic.esptest&hl=en&gl=us)
- [Full Intelligence Report](https://marlvel.ai/apps/zener-the-original-esp-test)

---
*This is an overview report. Sentiment analysis, competitive landscape, and SWOT analysis are available in the [full intelligence report](https://marlvel.ai/apps/zener-the-original-esp-test).*
*Generated by [Marlvel.ai](https://marlvel.ai) — Independent app intelligence.*