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

Enhance your memorized deck skills with daily practice sessions. This app offers guided learning for card sequences, detailed progress tracking, and various training modes to improve recall and fluency. It's designed for magicians to master their decks efficiently.

Highlights
  • Daily practice sessions
  • Guided PAO learning course
  • Card-to-position and position-to-card recall
  • Speed and accuracy training modes
  • Progress tracking with focus cards
  • Support for iPhone, iPad, and Apple Watch
Features
Read full description

Learn your memorized deck, then keep it sharp with a few minutes of practice a day. Practicing Mnemonica is free. Stack Trainer is built for magicians who use a memorized deck. Practice daily, build a streak, and see exactly which cards are slipping, so every session goes where it's needed. PRACTICE EVERY DAY - Short, focused sessions that fit into any day - Streaks, reminders and a Habit Tracker that shows every session at a glance - Awards and Personal Bests to mark your progress LEARN MNEMONICA CARD BY CARD A guided PAO course teaches each card with a vivid Person, Action and Object, then tests you both ways: card to position and position to card. A step-by-step plan takes you through all 52, followed by spaced reviews so the stack stays solid. The first 5 cards are free. Pro unlocks the full course. WAYS TO TRAIN CORE RECALL - Recall Quiz: card to position, position to card, next and previous card STACK FLUENCY - Matchup and 4 of a Kind: speed and accuracy against the clock - Stack Segments: master the deck in small groups, then expand - Grid Rebuild: put the full deck back in stack order in a grid - Fan Rebuild: put the full deck back in stack order in a card fan - Stack Trail (Pro): trace runs of cards in stack order PRACTICAL STACK WORK - ACAAN: find any card at any number - Improv (Pro): realistic cut, count and spell scenarios SEE WHAT TO WORK ON A 52-card map shows your strong and weak cards. Track accuracy, recall time and progress, and let Focus Cards bring back the cards that need more work. IPHONE, IPAD AND APPLE WATCH Train on iPhone, use the full-screen layout on iPad, and run quick recall drills on Apple Watch. Your Watch results sync with iPhone. FREE - Mnemonica practice in every mode except Improv - The first 5 cards of the PAO course - Streaks, Habit Tracker, Awards, Personal Bests and stats PRO: ONE-TIME UNLOCK - The full Mnemonica PAO course and learning plan - More stacks: Aronson, Redford, Particle System, Memorandum, Nikola Card System and Joyal - Build and train your own custom stack - Improv mode - Adaptive Focus Cards that prioritize your weakest cards - Notes and photos for each card - iCloud sync, backup and restore - Future Pro features No subscription. No ads. One purchase. 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 4.5. Memorize Fast also leads on iOS requirement (15.0 vs 17.6). Stack Trainer's advantage is update cadence (every 5 days vs every 9 days) and ratings volume (8 vs 2). On price, 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

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 4.5. Both are backed by a comparable volume of ratings — 2 and 8 respectively.

UpkeepUpdate frequency

Memorize Fast ships an update every 9 days, Stack Trainer every 5 days. The most recent releases landed on October 15, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 6 level
Memorize Fast versus Stack Trainer: the parameters behind the verdict, then further details
ParameterMemorize FastStack Trainer
PriceFreeFree
Rating5.0 (2 ratings) — better4.5 (8 ratings)
Positive reviews—71.4% of reviews
Number of ratings28 — better
Update frequencyEvery 9 daysEvery 5 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS15.0 — better17.6
Further details — not scored
Size45 MB124 MB
Age rating4+4+
DeveloperYevhen MurzikWayne Borcher

Customer experience

Memorize Fast

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

Stack Trainer

All ratings8 ratings
Positive75.0%
Neutral25.0%
Negative0.0%
Written reviews7 reviews
Positive71.4%
Neutral28.6%
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$19.99

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 4.5 from 8 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 October 15, 2026 and Stack Trainer on October 31, 2026.

Other comparisons