Comparison

Brain Guessing Game vs Onyx Magic

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Interactive card guessing
  • Animated reveals
  • Image generation for reveals
  • Calibration mode for advanced effects
  • Easy-to-use interface
  • Novel playing card reveal
Read full description

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)

About

Onyx Magic

This utility uses AI to remotely alter captured photos in real-time. It allows for seamless modifications to images moments after they are taken, directly on a spectator's device. Create impossible effects like changing playing cards, revealing hidden messages, or altering clock times within photos.

Highlights
  • Real-time AI photo modification
  • Remote image alteration
  • Spectator's camera integration
  • Physical photo printing (Onyx Print)
  • Third-party app integrations
  • Variable delayed input
Read full description

Onyx is a revolutionary utility that allows you to modify a captured image in real-time using variable input data. Using cutting edge AI, Onyx lets you remotely create seamless alterations to photos moments after they've been taken - all with your spectator's camera. For example: — Make a playing card appear in your spectator's wallet. — Morph your spectator's shadow to look like their thought of animal. — Take a photo of your spectator holding a signed card. They name *any* other card. The signed card in the photo transforms to match their thought. — Supplement your Gypsy Queen routine with Onyx: zoom in on a photo of your spectator holding the Queen of Hearts for the reveal. — Reveal a thought-of word, name, or initials hidden naturally in the light reflections of a spectator's eye. — Change the time on a photo of a clock. — Remove your spectator's wristwatch in a photo, making it sbeem that it was removed earlier. ...and more! If you can describe it, Onyx can likely create it. Onyx is particularly great for revealing something ephemeral. Photograph a shadow, clouds, a TV screen or more, and Onyx will realistically insert their free choice. * Variable Delayed Input Inspired by the popular variable trigger system featured in DFB X, Onyx pauses and automatically waits for input, letting you remotely modify a photo *after* it's been taken. * Cutting Edge Technology Take a photo, then have your spectator make a free choice. Onyx's advanced technology seamlessly transforms the photo remotely. * Create Unlimited Effects Change signed playing cards, reveal initials and names, or modify writing. Reveal *anything you can imagine* within a genuine photo you just took. * Your Integrations. Their Camera The effect happens entirely with the spectator's camera. With Onyx's powerful integrations, your phone never needs to leave your pocket. * Invisible, Advanced Technology As only the spectator's device is in play, Onyx remains hidden and inconspicuous. * Third Party Integrations Use your favourite magic apps' input methods, including: — Earworm's covert typing Web Search & Notes input — Native voice input — Native clock swipe input — WebFX's Wrist Gestures — WikiTest — PeekSmith — Bridge ...and any compatible third-party app. # Introducing: Onyx Print Onyx Print brings Onyx’s digital effect into the real world. # Produce Physical Photographs Instead of revealing information only on a screen, Onyx Print can generate and automatically print images on a pocket printer, allowing you to produce a real photograph from your wallet, pocket, or envelope for a powerful ending. # Dynamic Prompting Onyx Print uses the same dynamic prompting and covert input system that powers Onyx. Use any of Onyx’s input methods, and Onyx Print will automatically generate and print an image to match. # Use Your Own Photos You can even modify existing photos. For example: have Onyx Print set up with a photo of yourself and have a spectator name any place in the world. Onyx Print will then create and automatically print a realistic photo of you in that exact location, ready to reveal. # Works With Other Apps Onyx Print can even monitor your photo library and automatically print images saved by other apps. When an app saves a photo, Onyx Print can print it. Onyx Print is an in-app purchase within Onyx, and currently supports the Instax mini Link+, with plans for additional printers in the future. Onyx is a tool specifically designed for entertainment purposes. It uses purchaseable in-app credits or a funded OpenRouter account for best-in-class automatic edits. Onyx supports: Arabic, Bengali, Bulgarian, Chinese simplified and traditional, Croatian, Czech, Danish, Dutch, English, Estonian, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Latvian, Lithuanian, Norwegian, Polish, Portuguese, Romanian, Russian, Serbian, Slovak, Slovenian, Spanish, Swahili, Swedish, Thai, Turkish, Ukrainian, Vietnamese

Screenshots

Brain Guessing Game4 screens
Onyx Magic4 screens

Verdict

The call

The clearest difference is price: Brain Guessing Game at $39.99 against Onyx Magic's $64.99. Brain Guessing Game also leads on in-app purchases (none vs 2) and chart position (#189 vs unranked). Onyx Magic's advantage is ratings volume (13 vs 2). On rating, review sentiment, update cadence and ads 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

CostPrice · In-app purchases · Ads · Monetization

Brain Guessing Game costs $39.99 and Onyx Magic $64.99 up front. Onyx Magic sells 2 one-off in-app purchases. Brain Guessing Game asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Brain Guessing Game against 5.0 for Onyx Magic. That said, the two scores are not equally well evidenced: Onyx Magic has 13 ratings behind it against 2, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Brain Guessing Game ships an update every 3 weeks, Onyx Magic fortnightly. The most recent releases landed on October 1, 2026 and October 5, 2026 respectively.

Scorecard4 real differences · 7 level
Brain Guessing Game versus Onyx Magic: the parameters behind the verdict, then further details
ParameterBrain Guessing GameOnyx Magic
Price$39.99 — better$64.99
Rating5.0 (2 ratings)5.0 (13 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings213 — better
Update frequencyEvery 3 weeksFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidPaid
Best chart rank#189 — better—
DevicesiPhone, iPad — betteriPhone
Requires iOS17.0 — better18.2
Further details — not scored
Size87 MB36 MB
Age rating17+4+
DeveloperPenguin MagicMarc Kerstein

Customer experience

Brain Guessing Game

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Onyx Magic

All ratings13 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Brain Guessing Game

No in-app purchases

2 purchases

Onyx Magic

One-time2
  • 100 Onyx Credits$19.99
  • Onyx Print$49.99

Questions

Is Brain Guessing Game free?
Brain Guessing Game costs $39.99, with no in-app purchases.
Is Onyx Magic free?
Onyx Magic costs $64.99, and also offers in-app purchases.
Which has better reviews, Brain Guessing Game or Onyx Magic?
Brain Guessing Game and Onyx Magic are both rated 5.0 out of 5 on the App Store, from 2 and 13 ratings respectively.
Do Brain Guessing Game or Onyx Magic have ads?
Neither Brain Guessing Game nor Onyx Magic shows ads.
Which is updated more often, Brain Guessing Game or Onyx Magic?
Brain Guessing Game ships an update every 3 weeks, and Onyx Magic fortnightly. Most recently, Brain Guessing Game was updated on October 1, 2026 and Onyx Magic on October 5, 2026.

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