RemNum 〜 数字を暗記するだけのアプリ vs Zax
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
RemNum 〜 数字を暗記するだけのアプリ
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This is an app that only memorizes numbers. This app displays numbers one character at a time in order, so all you have to do is memorize and enter them. Use it for memory training.
Zax
This word game challenges players to create words from a letter rack, scoring based on the alphabetical distance between adjacent letters. Shorter words can achieve higher scores than longer ones by creating larger 'zigzags' on the A-Z chart. It offers daily challenges, a progression system through stages, and replayability.
- Plot letters to draw a path across A-Z
- Score based on alphabetical distance
- Five submits per round
- Compare your score to the ceiling
- Climb through five stages with power-ups
- Daily shared rack challenges
- Works fully offline
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Zax is a word arcade about distance, not length. Plot words from a 7-letter rack and watch the chart draw across A-Z. Every pair of neighboring letters scores by alphabet distance. A to Z is worth 25. Bigger distances, bigger score. The weird part is the hook: shorter words can beat longer ones. RATE scores 51. TRADE scores 23. Four letters can beat five when the chart moves farther. Each round gives you five submits. Every submit is a commit. No takebacks. Spend one on a safe word, or hold out for the bigger zigzag hiding in the rack. When the round ends, Zax reveals the ceiling: the best five possible words from your rack, shown beside what you actually played. See how close you got. See what you missed. WHAT YOU DO - Plot letters. The chart draws your path across A-Z. - Submit when the score feels worth it. - Use five submits, or lock the round early. - Compare your score with the ceiling. - Earn a grade from S to D, based on how close you got. - Chase your best rounds on the rounds sheet. CLIMB - Clear score gates across five stages. - Pick power-ups that reward sharp zigzags. - Miss the gate, restart the stage. Clear the summit, unlock replay. DAILY - One shared rack each day. - Build streaks for consecutive daily completions. - Share your score without spoiling the rack. - Turn on one quiet reminder if you want a nudge. - Missed a day? Every past daily is still playable, graded, and never touches your streak. WHY IT FEELS DIFFERENT - The best word is not always the longest word. - A valid word can still be a bad commit. - Every round ends by showing perfect. - The chart makes the score visible before you submit. NO NONSENSE - Works fully offline. - No account, no sign-up, no tracking, no ads. - No subscriptions. One optional supporter unlock for themes.
Screenshots
Verdict
The clearest difference is update cadence: Zax at every 3 days against RemNum 〜 数字を暗記するだけのアプリ's every 3 weeks. RemNum 〜 数字を暗記するだけのアプリ's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 17.0). On price, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
RemNum 〜 数字を暗記するだけのアプリ ships an update every 3 weeks, Zax every 3 days. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.
| Parameter | RemNum 〜 数字を暗記するだけのアプリ | Zax |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 weeks | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 12.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 48 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | yoshitomo ishii | Hamzah Hussain |
In-app purchases
RemNum 〜 数字を暗記するだけのアプリ
No in-app purchases
Zax
No in-app purchases









