jamo vs majors23
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
jamo
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Can you say "pizza"? In Hangul, that's νΌμ. You already know the sounds β jamo teaches you to read the letters. jamo is not a Korean language app. It's a Hangul alphabet app. Just like learning the Latin or Cyrillic alphabet, jamo helps you understand how Korean characters work β so you can read any Korean text out loud, even without knowing what it means. What you'll learn: Basic vowels & consonants Double vowels & double consonants Final consonants (λ°μΉ¨) 3 ways to learn: Listen β explore every consonant Γ vowel combination with native Korean audio Show Me β speak in your language and watch it appear in Hangul Practice β test yourself with 1,000 guided exercises across 10 sections "A wise man can acquaint himself with them before the morning is over; a stupid man can learn them in the space of ten days." β Jeong In-ji, Hunminjeongeum Haerye, 1446 jamo is built on that same idea. Start reading Hangul today.
majors23
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Stop forgetting numbers. Start seeing them. majors23 teaches you the Major System β 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 0β9 maps to a phonetic sound. Two digits make a word. That word has an image. Your brain remembers images far better than abstract numbers β 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 β 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 β Image or Image β 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 β 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.
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Verdict
The clearest difference is ads: majors23 at none against jamo's shown. majors23 also leads on update cadence (every 5 days vs every 7 months). jamo's advantage is iOS requirement (13.0 vs 17). On price, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
jamo ships an update every 7 months, majors23 every 5 days. The most recent releases landed on October 31, 2026 and November 9, 2026 respectively.
| Parameter | jamo | majors23 |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 7 months | Every 5 days β better |
| Ads | Yes | No β better |
| In-app purchases | No | No |
| Devices | iPhone, iPod β better | iPhone |
| Requires iOS | 13.0 β better | 17 |
| Further details β not scored | ||
| Size | 183 MB | 139 MB |
| Age rating | 12+ | 4+ |
| Developer | Youngjun Park | JAE HO YOON |
In-app purchases
jamo
No in-app purchases
majors23
No in-app purchases









