Comparison

Stack Trainer vs Buddy for KAIST

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

Head to head
About

Stack Trainer

This app provides a realistic card deck experience for close-up magicians to train their memory of card stacks. It offers various challenge modes and filters to aid learning and practice, with a focus on a clean, distraction-free interface.

Highlights
  • Realistic card deck simulation
  • Multiple mnemonic training approaches
  • Customizable stack filters
  • Lorrayne's peg words integration
  • Interactive quick-touch analyzer
  • Display and whisper modes
Features
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Stack Trainer forms part of a comprehensive suite of apps that dedicate to technical learning tools for Close-up magicians. Stack Trainer addresses those who are familiar with the concepts related to Aronson, Tamariz, Nikolas. If you know what these names relate to, and you apply the according techniques, then this app will help you stay tuned and inspired.  Stack Trainer provides a most realistic card deck experience. It sets the golden standard for mnemonic deck training. A radical slim design. Cycle through the logical phases of the challenges at hand. Name it the "virtual spectator" concept. Approaches: - Next Card: Sequentially displayed, name the next card - Each Card: Name each card's position in a shuffled stack - Each Position: Name each position's card in a shuffled stack - Get Position: Name the position of a given card - Get Card: Name the card at a given position - Next Suit: Name the distance to the next of the same suit - Wrong Card: Identify the one card that is displaced in the face-up spread stack - Missing Card: Find the missing card in the face-up spread stack - Spot: Spot a specific card in the face-up spread stack - Highest Card: Identify the high and low cards of a random sub-stack - Four of a Kind: Name the distance to the next of the same kind Filters: Filters can be set to reduce the actual stack to a substack of lower size addressing and supporting the gradual progress during the early learning phase of a stack. Filters also provide different perspectives onto a stack to inspire and engage expert users. These filters, applied to the chosen approach, can be set: - ranges 1-13, 14-26, 27-39, 40-52, and a custom range - pair and impair positions - red and black cards - any of the four suits - court and number cards Some Features: - Aronson, Tamariz and user defined stacks - Lorrayne's peg words for the 52 cards and 52 positions, plus 3 user defined sets - display and whisper modes - includes the quick-touch interactive analyser visualising the solution path and allowing for self imposed problem statements with decadic and tridecadic layouts - feedback driven development - feels almost like a true deck of cards. Practicing card magic you don't want no complicated, overloaded and distracting user interface. Less is more. - probably the most complete, and straightforward solution available. A card, the one downwards (or upwards), maybe its mates, maybe the next one of the same suit. Either on random walk, or deliberate choices on the complete map. Touch swipe, swipe. Swipe and again. To experience the look and feel of 'Stack Trainer' load the free 'Random Input' app available by this developer. Additional information: - License agreement - https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ - Privacy policy - https://yeahgic.com/pge_PrivacyStack.htm

About

Buddy for KAIST

Features
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Buddy is the all-in-one campus app designed exclusively for KAIST students. From managing your timetable to staying— your campus life. connected with the KAIST community, Buddy helps you focus on what matters — your campus life. Key features • Smart timetable with class reminders • Real-time campus community and posts • Secure KAIST user authentication • Native iOS experience with widgets and notifications Buddy integrates seamlessly with KAIST systems and is built with privacy and reliability in mind. Make your KAIST life simpler. Stay organised. Stay connected. With Buddy.

Screenshots

Stack Trainer4 screens
Buddy for KAIST4 screens

Verdict

The call

The clearest difference is price: Buddy for KAIST at Free against Stack Trainer's $3.99. Buddy for KAIST also leads on in-app purchases (none vs 2) and update cadence (every 3 weeks vs every 3 months). Stack Trainer's advantage is iOS requirement (15.6 vs 26.1). On ads and device support 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

Buddy for KAIST is free to download; Stack Trainer costs $3.99 up front. Stack Trainer sells 2 in-app purchases, starting at $1.99 per 3 months. Buddy for KAIST asks for nothing beyond the download.

UpkeepUpdate frequency

Stack Trainer ships an update every 3 months, Buddy for KAIST every 3 weeks. The most recent releases landed on October 7, 2026 and October 24, 2026 respectively.

Scorecard4 real differences · 6 level
Stack Trainer versus Buddy for KAIST: the parameters behind the verdict, then further details
ParameterStack TrainerBuddy for KAIST
Price$3.99Free — better
Rating1.0 (1 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscription—
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS15.6 — better26.1
Further details — not scored
Size6 MB61 MB
Age rating4+4+
DeveloperRalph CosSPARCS

In-app purchases

2 purchases

Stack Trainer

Subscriptions2
  • 3 Months Subscription7 Days trial$1.993 Months
  • Annual Subscription$2.991 Year
None

Buddy for KAIST

No in-app purchases

Questions

Is Stack Trainer free?
Stack Trainer costs $3.99, and also offers in-app purchases.
Is Buddy for KAIST free?
Buddy for KAIST is free to download, with no in-app purchases.
Do Stack Trainer or Buddy for KAIST have ads?
Neither Stack Trainer nor Buddy for KAIST shows ads.
Which is updated more often, Stack Trainer or Buddy for KAIST?
Stack Trainer ships an update every 3 months, and Buddy for KAIST every 3 weeks. Most recently, Stack Trainer was updated on October 7, 2026 and Buddy for KAIST on October 24, 2026.

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