The Jerx vs Brain Guessing Game
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
The Jerx
This utility app enables users to perform various mentalism and magic effects. It allows for creating illusions of memory loss, cognitive impairment, mind-reading, and predictions. Some effects may require additional physical materials.
- Memory loss illusions
- Cognitive impairment effects
- Mind reading capabilities
- Prediction effects
- Dual-reality illusions
- Thought implantation
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The Jerx App is a utility magic app that can be used to create a myriad of different effects, including: - A Cute Memory Loss: Cause a spectator to forget something she just saw. - Pee Hill Pot: Induce a mild, momentary loss of cognitive ability. Just by touching your spectator's head you reduce their reading ability to that of a 6-year-old. - ScribBold: You read a spectator's mind, or one spectator reads another's mind to determine a thought of word or concept that is never written down or spoken aloud. - Chocolate/Vanilla Twist: A perfect 50/50 prediction. - Digital Linger: Create dual-reality effects for one person. - I Know What You Need: Apparently implant a thought in a spectator's mind (requires The Jerx, Volume One book).
Brain Guessing Game
Engage in a clever card guessing game with a friend. This app generates unique images to reveal a chosen card in an astonishing way. Explore various animations and a calibration mode for advanced reveals.
- Interactive card guessing
- Animated reveals
- Image generation for reveals
- Calibration mode for advanced effects
- Easy-to-use interface
- Novel playing card reveal
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Play a fun game with a friend and guess what card they picked! Generate an image and reveal the answer in a clever way using that image! This is a fun, modern way to reveal any playing card. Complete with various engaging animations, the interface is super easy to use, and the reveal images offer endless presentations. For a truly baffling experience, calibration mode allows you to perform a secondary effect where you can determine a single card removed from a face-up deck. Whether you use a freely named card, a marked deck, or sleight of hand, your audience is going to fall in love with this truly novel playing card reveal. Perform your next playing card reveal with the Brain Guessing Game from Penguin Magic. (Playing cards not included)
Screenshots
Verdict
The clearest difference is price: Brain Guessing Game at $39.99 against The Jerx's $89.99. Brain Guessing Game also leads on review sentiment (100% vs 67%) and update cadence (every 3 weeks vs every 4 months). The Jerx's advantage is ratings volume (11 vs 2). On rating, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
The Jerx costs $89.99 and Brain Guessing Game $39.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.9 for The Jerx against 5.0 for Brain Guessing Game. That said, the two scores are not equally well evidenced: The Jerx has 11 ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 67% of The Jerx's written reviews are positive against 100% of Brain Guessing Game's.
The Jerx ships an update every 4 months, Brain Guessing Game every 3 weeks. The most recent releases landed on October 24, 2026 and October 17, 2026 respectively.
| Parameter | The Jerx | Brain Guessing Game |
|---|---|---|
| Price | $89.99 | $39.99 — better |
| Rating | 4.9 (11 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 66.7% of reviews | 100.0% of reviews — better |
| Number of ratings | 11 — better | 2 |
| Update frequency | Every 4 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 4 MB | 87 MB |
| Age rating | 17+ | 17+ |
| Developer | Marc Kerstein | Penguin Magic |
Customer experience
The Jerx
Brain Guessing Game
In-app purchases
The Jerx
No in-app purchases
Brain Guessing Game
No in-app purchases
Questions
Is The Jerx free?
Is Brain Guessing Game free?
Which has better reviews, The Jerx or Brain Guessing Game?
Do The Jerx or Brain Guessing Game have ads?
Which is updated more often, The Jerx or Brain Guessing Game?
Other comparisons
