Memorize Fast vs Stack Trainer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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)
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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.
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.
- 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
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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
Verdict
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
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.
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.
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.
| Parameter | Memorize Fast | Stack Trainer |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | 4.5 (8 ratings) |
| Positive reviews | — | 71.4% of reviews |
| Number of ratings | 2 | 8 — better |
| Update frequency | Every 9 days | Every 5 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 15.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 45 MB | 124 MB |
| Age rating | 4+ | 4+ |
| Developer | Yevhen Murzik | Wayne Borcher |
Customer experience
Memorize Fast
Stack Trainer
In-app purchases
Memorize Fast
- Lifetime Pro Access$4.99
Stack Trainer
- Stack Trainer Pro$19.99
Questions
Is Memorize Fast free?
Is Stack Trainer free?
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