Comparison

Stack Master vs ACAAT CHRONOMASTER

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

Head to head
About

Stack Master

Master your favorite card stacks with this mobile training application. It offers multiple training modes and challenges to analyze your weaknesses and improve your learning curve. Supports various pre-set and custom stacks.

Highlights
  • Multiple training modes
  • 18 funny challenges
  • Supports pre-set stacks
  • Create custom stacks
  • Publish scores and compare with friends
  • Specialized training modules
Features
Read full description

Stack Master is a stack training application. To learn a stack, best option from my perspective, are the flash cards. There are some awesome flash cards applications but I wanted something "stack oriented", easy and fun, that runs on my mobile phone ; a simple mobile application that analyzes my weaknesses and "trains" me accordingly, remembering my "weak cards" and my learning curve. Stack Master offers you to study your stack without pain, using 9 clever training modes and 18 funny challenges. Stack Master supports multiple stacks (Mnemonica, Aronson, Osterlind, Redford, Si-stebbins, Rix...) and you can add and create custom ones, directly from the application. You can even publish your score challenges and compare them with those of your friends! Besides the 18 funny challenges and the 4 training modules, 5 special training modules are available as well: * "The core", if you bought this nice routine of Pitt Hartling, you'll be able to train yourself with this dedicated module. * "Perfect hit", if you wish to improve your practice of effects like "Mnemonicosis" of the master Juan Tamariz, then this module is for you. * "Miracaan", if you bought this nice ACAAN of Dorian Caudal, you'll be able to train yourself with this dedicated module. * "Decimals of Pi", if you bought this effect of Vincent Hedan, you'll be able to train yourself with this dedicated module. * "Sandbox", if you only need to experiment something with a virtual deck of cards, be my guest!

About

ACAAT CHRONOMASTER

This app allows users to force card positions and numbers within stacks, offering multiple input methods and advanced customization. It supports integrations with other platforms and provides developers with an API for custom solutions.

Highlights
  • Stack forcing
  • Number forcing
  • Remote control input
  • Lockscreen input
  • Multi-forcing up to 3 numbers
  • Pre-record numbers
  • Webhook integration
Features
Read full description

Core Features Recap The classic features that made the app a success are back: Stack Forcing: Force a card’s position in any stack. Number Forcing: Direct number forcing. Integrations: Full Flitch integration. Input Methods: Input via Inject. Input via Remote Control. Input via Lockscreen (New!). What's New in 2026 The application has undergone a total rewrite and redesign for maximum power and flexibility: Multi-Forcing: Force up to 3 numbers consecutively. Pre-sets: Pre-record numbers to force in advance. Configurable Workflow: Fully customize how your effects play out. Activation Methods: Various new ways to trigger the force discreetly. Inject Output: Now compatible with Inject for output (sending data out). Flitch 2.0: Simplified and optimized management of Flitch effects. Advanced Connectivity: Dedicated API for developers. Webhook Integration (allows connection to automation platforms like n8n). ...and more features are on the way!

Screenshots

Stack Master2 screens
ACAAT CHRONOMASTER4 screens

Verdict

The call

The clearest difference is price: Stack Master at $24.99 against ACAAT CHRONOMASTER's $69.99. Stack Master also leads on in-app purchases (none vs 2) and chart position (#200 vs unranked). ACAAT CHRONOMASTER's advantage is rating (5.0 vs 3.8) and update cadence (every 3 days vs every 3 weeks). On ads, monetization model 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

Stack Master costs $24.99 and ACAAT CHRONOMASTER $69.99 up front. ACAAT CHRONOMASTER sells 2 one-off in-app purchases. Stack Master asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

ACAAT CHRONOMASTER holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Stack Master has 9 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 83% of Stack Master's written reviews are positive against 100% of ACAAT CHRONOMASTER's.

UpkeepUpdate frequency

Stack Master ships an update every 3 weeks, ACAAT CHRONOMASTER every 3 days. The most recent releases landed on September 7, 2026 and September 26, 2026 respectively.

Scorecard8 real differences · 3 level
Stack Master versus ACAAT CHRONOMASTER: the parameters behind the verdict, then further details
ParameterStack MasterACAAT CHRONOMASTER
Price$24.99 — better$69.99
Rating3.8 (9 ratings)5.0 (1 ratings) — better
Positive reviews83.3% of reviews100.0% of reviews — better
Number of ratings9 — better1
Update frequencyEvery 3 weeksEvery 3 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidPaid
Best chart rank#200 — better—
DevicesiPhone, iPad, iPod — betteriPhone, Apple Watch
Requires iOS11.0 — better17.1
Further details — not scored
Size36 MB8 MB
Age rating4++4
DeveloperDevious-Monkeysebastien macak

Customer experience

Stack Master

All ratings9 ratings
Positive77.8%
Neutral0.0%
Negative22.2%
Written reviews12 reviews
Positive83.3%
Neutral8.3%
Negative8.3%

ACAAT CHRONOMASTER

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews19 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Stack Master

No in-app purchases

2 purchases

ACAAT CHRONOMASTER

One-time2
  • acaat watch compagnon$19.99
  • ACAAT Appclip config$22.99

Questions

Is Stack Master free?
Stack Master costs $24.99, with no in-app purchases.
Is ACAAT CHRONOMASTER free?
ACAAT CHRONOMASTER costs $69.99, and also offers in-app purchases.
Which has better reviews, Stack Master or ACAAT CHRONOMASTER?
ACAAT CHRONOMASTER is rated higher. Stack Master averages 3.8 out of 5 from 9 ratings, while ACAAT CHRONOMASTER averages 5.0 from 1 ratings.
Do Stack Master or ACAAT CHRONOMASTER have ads?
Neither Stack Master nor ACAAT CHRONOMASTER shows ads.
Which is updated more often, Stack Master or ACAAT CHRONOMASTER?
Stack Master ships an update every 3 weeks, and ACAAT CHRONOMASTER every 3 days. Most recently, Stack Master was updated on September 7, 2026 and ACAAT CHRONOMASTER on September 26, 2026.

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