素因数分解キングダム vs Prime Nerd
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
素因数分解キングダム
Read full descriptionHide full description
素因数分解キングダムはゲームを通じて、素因数分解を学ぶことができるアプリです。 単にゲームとして楽しむだけでなく、定期テスト対策や受験勉強の一環としても活用できます。 また、脳トレとしても効果的なので、学生以外にもおすすめです。 "Prime Factorization Kingdom" is an app that allows users to learn prime factorization through gameplay. Not only can it be enjoyed as a game, but it can also be utilized as part of regular test preparation or entrance exam studies. Additionally, it is effective as a brain-training tool, making it highly recommended not just for students but for people of all ages.
Prime Nerd
Tap prime numbers as they float across the screen within a time limit. This speed math game offers multiple difficulty levels, a combo system for score multipliers, and a training mode to hone your skills. Compete globally on the leaderboard and customize your challenge with digit selection.
- Identify prime numbers
- Timed challenges
- Global leaderboard
- Multiple difficulty levels
- Combo score multiplier
- Training mode
- Dark/Light theme
Read full descriptionHide full description
Spot the prime numbers and tap them before time runs out — a simple but surprisingly deep speed math game. HOW TO PLAY Bubbles float across the screen showing numbers. Tap only the primes! You have 30 seconds — how many can you get right? Tapping a composite number counts as a miss, so think fast. FEATURES · Global Leaderboard — Submit your score and compete with players worldwide · 4 Difficulty Levels — EASY / NORMAL / HARD, plus a secret LEGEND mode to unlock · Digit Customization — Choose 1 to 5 digits. Bigger numbers = harder = higher points · Combo System — Chain correct taps to multiply your score · Training Mode — Practice without a timer and sharpen your prime sense · Dark / Light Theme — Easy on the eyes, day or night · Japanese / English supported WHO IS IT FOR? Anyone who loves math or numbers People looking for a quick mental workout Players who want to compete on leaderboards Anyone who wants to train focus and reaction speed A prime number is any integer greater than 1 that can only be divided by 1 and itself (2, 3, 5, 7, 11,13…). They seem familiar — until the numbers get big. That's the challenge. Watch a short video ad to enjoy 1 hour of ad-free play. So, what's your score?
Screenshots
Verdict
The clearest difference is ads: 素因数分解キングダム at none against Prime Nerd's shown. Prime Nerd's advantage is update cadence (every 3 days vs weekly). On price, in-app purchases, device support and iOS requirement 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.
素因数分解キングダム ships an update weekly, Prime Nerd every 3 days. The most recent releases landed on October 14, 2026 and October 11, 2026 respectively.
| Parameter | 素因数分解キングダム | Prime Nerd |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| Update frequency | Weekly | Every 3 days — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | — | Ad-supported |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 55 MB | 50 MB |
| Age rating | 4+ | 4+ |
| Developer | Yuta Matsuda | Hiroki Sekimoto |
In-app purchases
素因数分解キングダム
No in-app purchases
Prime Nerd
No in-app purchases








