Comparison

Memorize Fast vs Stack Trainer

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

Head to head
About

Memorize Fast

This app uses mnemonic techniques to help you memorize numbers like phone numbers, PINs, and passcodes. It transforms digits into vivid images for natural recall, requiring minimal daily practice. Unlock advanced features with custom mappings.

Highlights
  • Memorize phone numbers and passcodes
  • Remember long number sequences
  • Learn Major and PAO systems
  • Improve recall accuracy
  • Daily practice under a minute
  • Create custom number mappings (Pro)
Features
Read full description

Stop forgetting numbers you actually need. NumMnemonic helps you memorize phone numbers, PINs, passcodes and long number sequences using proven mnemonic techniques. Instead of drilling digits repeatedly, you turn numbers into vivid images your brain remembers naturally. With NumMnemonic you can: • Memorize phone numbers and passcodes • Remember long number sequences • Learn Major and PAO systems • Improve recall accuracy • Practice daily in under a minute • Create custom number mappings (Pro) Built for practical everyday use. No ads. No noise. Just better number memory.

About

Stack Trainer

This app helps magicians memorize and recall card stacks with gamified drills and performance scenarios. It offers various practice modes to build speed, accuracy, and long-term retention of memorized decks.

Highlights
  • Gamified daily drills
  • Memorized deck recall training
  • Multiple practice modes
  • Performance tracking
  • Awards and personal bests
  • Apple Watch practice
Features
Read full description

Train your recall of Mnemonica and other memorized decks with Focused Daily Drills, Awards, Personal Bests, Apple Watch practice, and a one-time Pro unlock. Now you can also learn the Mnemonica Stack with the same one-time Pro unlock. Stack Trainer is the memorized-deck training app for magicians who want to build genuine, performance-ready stack fluency. Start by learning Mnemonica through an interactive PAO Peg course, then sharpen recall, speed and confidence with focused daily practice. The new PAO Peg Training teaches the stack card by card using vivid Person, Action and Object memory links, visual reinforcement, guided questions and active recall. Free users can experience the first five Mnemonica cards; unlock Pro to continue the complete course and turn your training into a full-stack skill. Whether you are learning your first memdeck or keeping an established stack sharp, Stack Trainer gives you a structured path from knowing a card to using it under pressure. Train the Skills That Matter Learn Mnemonica - Guided PAO Peg lessons that build card-to-position and position-to-card recall - Visual memory links, hints and progressive practice - First five cards free; complete training course with Pro Core Recall - Instantly recall a card from its position — and its position from the card - Train next-card and previous-card recall - Focus on small card groups, then expand toward the full stack Stack Fluency - Matchup, 4 of a Kind, Stack Segments and Rebuild Stack - Build speed, accuracy and whole-stack confidence Practical Stack Work - ACAAN practice for Any Card at Any Number thinking - Improv scenarios for flexible cut, count and reveal work Train Smarter Build the habit with daily reminders, streaks, Awards, Personal Bests and session statistics. Track your accuracy, recall time, weak cards and progress, then return to the cards that need more work. PAO memory links, notes, photos and focused repetition help turn fragile recall into practical fluency. Apple Watch - Keep your recall sharp anywhere with quick wrist-based practice. Your stats sync with iPhone. Pro — One-Time Unlock Unlock the complete Mnemonica PAO Peg training course, adaptive practice tools and the full Stack Trainer experience: - Full Mnemonica PAO Peg Training beyond the first five free cards - Adaptive card prioritization and spaced-repetition-based training - Additional stacks: Aronson, Redford, Particle System, Memorandum, Nikola Card System and Joyal - Create and train your own custom stacks - Full practical modes, including Improv with random starting-cut practice - Notes and photos in Learn Stack - Cloud sync for backup and restore - Future Pro features No ads. One purchase. A stack you can actually use. Train daily. Build fluency. Know your stack.

Screenshots

Memorize Fast4 screens
Stack Trainer4 screens

Verdict

The call

The clearest difference is rating: Memorize Fast at 5.0 against Stack Trainer's 4.6. Memorize Fast also leads on iOS requirement (15.0 vs 17.6). On price, ratings volume, 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

Both are free to download. Memorize Fast sells 1 one-off in-app purchase and Stack Trainer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Memorize Fast holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 2 and 5 respectively.

UpkeepUpdate frequency

Memorize Fast ships an update every 9 days, Stack Trainer every 5 days. The most recent releases landed on September 29, 2026 and October 2, 2026 respectively.

Scorecard2 real differences · 8 level
Memorize Fast versus Stack Trainer: the parameters behind the verdict, then further details
ParameterMemorize FastStack Trainer
PriceFreeFree
Rating5.0 (2 ratings) — better4.6 (5 ratings)
Positive reviews—66.7% of reviews
Number of ratings25 — better
Update frequencyEvery 9 daysEvery 5 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS15.0 — better17.6
Further details — not scored
Size45 MB115 MB
Age rating4+4+
DeveloperYevhen MurzikWayne Borcher

Customer experience

Memorize Fast

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Stack Trainer

All ratings5 ratings
Positive80.0%
Neutral20.0%
Negative0.0%
Written reviews3 reviews
Positive66.7%
Neutral33.3%
Negative0.0%

In-app purchases

1 purchases

Memorize Fast

One-time1
  • Lifetime Pro Access$4.99
1 purchases

Stack Trainer

One-time1
  • Stack Trainer Pro$9.99

Questions

Is Memorize Fast free?
Memorize Fast is free to download, with in-app purchases available.
Is Stack Trainer free?
Stack Trainer is free to download, with in-app purchases available.
Which has better reviews, Memorize Fast or Stack Trainer?
Memorize Fast is rated higher. Memorize Fast averages 5.0 out of 5 from 2 ratings, while Stack Trainer averages 4.6 from 5 ratings.
Do Memorize Fast or Stack Trainer have ads?
Neither Memorize Fast nor Stack Trainer shows ads.
Which is updated more often, Memorize Fast or Stack Trainer?
Memorize Fast ships an update every 9 days, and Stack Trainer every 5 days. Most recently, Memorize Fast was updated on September 29, 2026 and Stack Trainer on October 2, 2026.

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