# Zener , The original ESP Test — Extrasensory Perception Test > Original ESP test with five symbols: circle, cross, lines, square, star. (iPhone/iPad app by Ioannis Gkortsos.) - Source: https://appshunter.io/ios/app/zener-the-original-esp-test/id999867194 (this page in markdown: same URL + `.md`) - Developer: [Ioannis Gkortsos](https://appshunter.io/developer/945744733) - Category: Entertainment - Price: Free (on sale, was $1.99) - Rating: 1.00/5 from 2 App Store ratings · 4 written reviews indexed - Age rating: 4+ - Requires: iOS 15.6 · 3 MB - Languages: American English - Released: 2015-06-27 - Data updated: 2026-06-09 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/zener-the-original-esp-test/id999867194/reviews.md ## What is Zener , The original ESP Test? Welcome to ZENER, the original ESP Test. This is the extrasensory perception test, excactly as it was originally invented and conducted by the perceptual psychologist Karl Zener in the early 1930s. ▶The test: Open Zener and browse between a deck of cards made up of five simple symbols: ◆ A hollow circle ◆ A Greek cross ◆ Three vertical wavy lines ◆ A hollow square ◆ A hollow five-pointed star The person conducting the test (sender) freely chooses a card and concentrates on its symbol. The person being tested for extrasensory perception (receiver) tries to determine which card he/she has selected. For any questions/comments please visit our Official Website : http://www.onetwo.gr ## Key features - Original ESP test simulation - Five distinct symbols - Sender and receiver roles - Classic psychological experiment ## Recent user reviews (4 of 4) All indexed reviews: https://appshunter.io/ios/app/zener-the-original-esp-test/id999867194/reviews.md ### 1/5 — It keeps freezing *2023-08-30* So I can’t even get into the app. It just freezes. ### 1/5 — What’s the point? *2020-08-29* Anyone explain where’s the test itself?? ### 1/5 — Worthless *2020-01-19* No instructions, no way to make it do anything. All it does is show and cycle the patterns. You can tap a pattern and instantly get absolutely no response. You can jump up and down on your iPad or phone while running and by doing so, actually get the same result—nothing. You can delete the app and actually get a result—more storage space on your device for things that actually work. ### 3/5 — Believe it or don't .. *2017-07-20* It has preset patterns - looks cool, needs a randomizer and more zener patterns and variables .. with a score counter for right and wrong that can be compared over time -like say on a calendar I think it's neat 👍 and has potential to be really fun and cool ## Frequently asked questions about Zener , The original ESP Test ### What is Zener? Zener is the original extrasensory perception test, simulating the experiment developed by Karl Zener in the 1930s. It involves a sender concentrating on one of five symbols and a receiver attempting to guess it. ### What are the symbols used in Zener? The test uses five simple symbols: a hollow circle, a Greek cross, three vertical wavy lines, a hollow square, and a hollow five-pointed star. ### Is Zener free to download and use? Yes, Zener is available for free. It does not have any in-app purchases or advertisements, making it a completely free experience. ### What devices does Zener support? Zener is available on iPhone, iPad, and iPod devices, allowing a wide range of Apple users to experience the ESP test. ### How often is Zener updated? The latest version of Zener is 2.2, and it was last updated on July 30, 2025. This indicates regular maintenance and potential for future improvements. ### What is the age rating for Zener? Zener has an age rating of 4+, making it suitable for a very young audience and generally safe for most users. ### What do users think of Zener? Based on the provided data, Zener has a rating of 1.0 stars from 2 ratings. This suggests a very low user satisfaction based on the limited feedback available. ### Does Zener have ads? No, Zener does not contain advertisements. The app is completely free and ad-free, providing an uninterrupted user experience. ## Version history (last 5 releases) ### 2.2 — 2025-07-30 • Welcome to Zener 2.0 , the BEST ESP Test on the App Store • Introducing our brand NEW user interface! A simple yet sophisticated way to guide you through the app! • Introducing a NEW, improved instruction manual! • Major updates on the core algorithm of Zener that will significantly improve the speed, the accuracy and the power efficiency of the app! • Zener is now fully compatible with the latest iOS devices using the latest technologies available from Apple! • Introducing the "Magic App Library"! The best way to discover our magic world! A world full of new, amazing magic tricks that will transform your iPhone into a powerful magic tool and make you one of the best magicians of the digital era! ### 2.1 — 2025-02-26 • Welcome to Zener 2.0 , the BEST ESP Test on the App Store • Introducing our brand NEW user interface! A simple yet sophisticated way to guide you through the app! • Introducing a NEW, simple instruction manual. • Major updates on the core algorithm of Zener that will significantly improve the speed, the accuracy and the power efficiency of the app! • Zener is now fully compatible with the latest iOS devices using the latest technologies available from Apple! • Introducing the "Magic App Library"! The best way to discover our magic world! A world full of new, amazing magic tricks that will transform your iPhone into a powerful magic tool and make you one of the best magicians of the digital era! ### 2.0 — 2021-12-08 • Welcome to Zener 2.0 , the BEST ESP Test on the App Store • Introducing our brand NEW user interface! A simple yet sophisticated way to guide you through the app! • Introducing a NEW, simple instruction manual. • Major updates on the core algorithm of Zener that will significantly improve the speed, the accuracy and the power efficiency of the app! • Zener is now fully compatible with the latest iOS devices using the latest technologies available from Apple! • Introducing the "Magic App Library"! The best way to discover our magic world! A world full of new, amazing magic tricks that will transform your iPhone into a powerful magic tool and make you one of the best magicians of the digital era! ### 1.4 — 2018-07-15 This app has been updated by Apple to display the Apple Watch app icon. •iPhone X ready! ### 1.3 — 2017-10-20 • Support for iOS 11. ## Apps similar to Zener , The original ESP Test | App | Rating | Price | Category | | --- | --- | --- | --- | | [David Heavener TV](https://appshunter.io/ios/app/david-heavener-tv/id1509439633) | 5.0 (9) | Free | Entertainment | | [Pocket Visions Tarot](https://appshunter.io/ios/app/pocket-visions-tarot/id1620255013) | 4.8 (31) | $2.99 | Entertainment | | [The Stranger](https://appshunter.io/ios/app/the-stranger/id1397183489) | 4.9 (86) | Free | Entertainment | | [Blind Spot Oracle Cards](https://appshunter.io/ios/app/blind-spot-oracle-cards/id1463973189) | 4.8 (59) | $17.99 | Entertainment | | [Provenance App](https://appshunter.io/ios/app/provenance-app/id1596862805) | 3.3 (663) | Free | Entertainment | | [Patterns of Pathology](https://appshunter.io/ios/app/patterns-of-pathology/id6636532244) | — | Free | Entertainment | ## More apps by Ioannis Gkortsos - [Adyton - Magic Trick (Tricks)](https://appshunter.io/ios/app/adyton-magic-trick-tricks/id945744734) - [Dark Force - Air Gesture Magic](https://appshunter.io/ios/app/dark-force-air-gesture-magic/id969890603) - [Avaton - Magic Trick (Tricks)](https://appshunter.io/ios/app/avaton-magic-trick-tricks/id999850829) - [Four Horsemen - Magic Trick](https://appshunter.io/ios/app/four-horsemen-magic-trick/id1156938717) - [Nevma - Magic Trick (Tricks)](https://appshunter.io/ios/app/nevma-magic-trick-tricks/id1163942693) All apps by Ioannis Gkortsos: https://appshunter.io/developer/945744733 ## Related topics [ioannis gkortsos](https://appshunter.io/ios/topics/ioannis-gkortsos) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-09.*