Comparison

majors23 vs Foldmetry

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

Head to head
About

majors23

Features
Read full description

Stop forgetting numbers. Start seeing them. majors23 teaches you the Major System — a proven mnemonic technique that converts digits into consonant sounds, which you then turn into vivid words and images. Phone numbers, PINs, dates, historical years, mathematical constants: anything becomes a picture you can't unsee. HOW IT WORKS Each digit 0–9 maps to a phonetic sound. Two digits make a word. That word has an image. Your brain remembers images far better than abstract numbers — that's the whole trick. FOUR TABS. ONE SYSTEM. Reference Browse all 100 number-image-word associations in a 5-column grid. Hide numbers, pictures, or words to self-test. Tap any cell to reveal it. Read aloud with built-in voice playback — hear the number and word spoken together at adjustable speeds. Double-tap anywhere to stop. Generate Type any sequence of digits and instantly see the matching image-word pairs. Perfect for encoding phone numbers, PINs, or constants like Pi and Euler's number. Copy the words or a learning prompt in one tap. Save any sequence with your own visual story sentence for later review. Quiz Test yourself in two directions: Number → Image or Image → Number. Choose multiple choice or type-in answers. Target any range of numbers, drill specific digit combinations with Matrix mode, or let the app automatically surface your weakest numbers in Difficult mode. Quit any time without affecting your stats. Stats Track accuracy and average response time for every number across both quiz types. Sort by any column to spot your blind spots at a glance. FEATURES 100 hand-curated mnemonic images Voice reading with number + word spoken aloud Configurable quiz: range, matrix, or difficulty-based selection Unlimited questions with automatic recycling Persistent stats saved on-device Day and night display modes No account required — everything stays on your device Whether you are preparing for a memory competition, trying to memorize your passport number, or just curious about how memory athletes think, majors23 gives you the full toolkit. Start with 00. You will never forget Zeus again.

About

Foldmetry

Practice spatial reasoning skills for 11+ and CAT4-style assessments. Offers interactive exercises in mental rotation, cube nets, perspective taking, paper folding, block assembly, and cross sections. Unlock full features with a subscription or lifetime purchase.

Highlights
  • Mental Rotation exercises
  • Cube Nets prediction
  • Perspective Taking visualization
  • Paper Folding reversal
  • Block Assembly counting
  • Cross Sections slicing
  • Timed exam-style practice
Features
Read full description

Practise spatial skills for 11+ non-verbal reasoning and CAT4-style spatial tasks. Preparing for grammar school or independent school assessments? Foldmetry offers short, focused practice in visualising shapes, understanding folds, and reasoning in 3D. Use it alongside your wider preparation: it is not a complete 11+ or CAT4 course and does not reproduce official tests. Foldmetry turns six spatial-reasoning skills into clear, interactive exercises: • Mental Rotation: recognize a solid after it turns in 3D • Cube Nets: predict how a flat net folds into a cube • Perspective Taking: visualize structures from another viewpoint • Paper Folding: reverse folds and predict position patterns • Block Assembly: count volume, missing cubes, and exposed faces • Cross Sections: find exact slices through 3D structures START FREE Start all six paths, complete the first two lessons in each path, try a daily mixed session, and review up to three missed questions at a time. Best scores, stars, streaks, and recent progress stay on your device. TIMED EXAM-STYLE PRACTICE With Pro, try 12 mixed questions across all six skills, with 40 seconds per question. Review accuracy and response time by skill to plan your next session. This is Foldmetry's own practice format, not an official exam simulation. PRACTICE YOUR WAY WITH FOLDMETRY PRO Unlock all 36 guided lessons, full ten-question Mistake Review, unlimited practice at difficulty levels 1–10, selectable session lengths, and complete training history. Choose an annual subscription with a 7-day free trial for eligible customers, or unlock Pro with a one-time lifetime purchase. Pricing and eligibility appear in the App Store purchase sheet. Restore purchases at any time from Settings. PRIVATE BY DESIGN No account. No ads. No behavioral tracking across apps or websites. Your training history, mistake queue, and preferences remain on your device. Foldmetry uses privacy-friendly anonymous analytics (TelemetryDeck) to understand which features help; you can turn this off in Settings. Exercises and licensed paper-folding animations work offline; a network connection is used for App Store purchases and optional analytics. Foldmetry is an independent educational practice tool. It does not measure IQ, provide medical advice, guarantee academic or exam results, or claim affiliation with any examination authority. CAT4 is a GL Assessment test; Foldmetry is not affiliated with or endorsed by GL Assessment. Terms of Use: https://sdli416.github.io/MyStockYardagesPrivacy/foldmetry/terms/ Privacy Policy: https://sdli416.github.io/MyStockYardagesPrivacy/foldmetry/privacy/

Screenshots

majors234 screens
Foldmetry4 screens

Verdict

The call

The clearest difference is in-app purchases: majors23 at none against Foldmetry's 2. On price, update cadence, 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

Both are free to download. Foldmetry sells 2 in-app purchases, starting at $9.99 per year. majors23 asks for nothing beyond the download.

UpkeepUpdate frequency

majors23 ships an update every 5 days, Foldmetry every 9 days. The most recent releases landed on October 8, 2026 and October 1, 2026 respectively.

Scorecard1 real difference · 9 level
majors23 versus Foldmetry: the parameters behind the verdict, then further details
Parametermajors23Foldmetry
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 5 days — betterEvery 9 days
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhoneiPhone, iPad — better
Requires iOS1717.0
Further details — not scored
Size139 MB16 MB
Age rating4+4+
DeveloperJAE HO YOON思迪 李

In-app purchases

None

majors23

No in-app purchases

2 purchases

Foldmetry

Subscriptions1
  • Foldmetry Pro Annual7 Days trial$9.991 Year
One-time1
  • Foldmetry Pro Lifetime$24.99

Questions

Is majors23 free?
majors23 is free to download, with no in-app purchases.
Is Foldmetry free?
Foldmetry is free to download, with in-app purchases available.
Do majors23 or Foldmetry have ads?
Neither majors23 nor Foldmetry shows ads.
Which is updated more often, majors23 or Foldmetry?
majors23 ships an update every 5 days, and Foldmetry every 9 days. Most recently, majors23 was updated on October 8, 2026 and Foldmetry on October 1, 2026.

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