Comparison

素因数分解クイズ vs Prime Nerd

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

Head to head
About

素因数分解クイズ

Features
Read full description

素因数分解を見極めろ!あなたの分解力が試される! 表示される数値から正しい因数分解の解答を選び、ランキング上位を目指す脳トレ系クイズゲーム。 遊びながら数学を鍛え、瞬発力を向上させよう。 遊び方 • 画面に数値が表示される • 4つの選択肢から正しい素因数分解の解答を選ぶ • 早く答えるほどスコアが上がり、制限時間が増加 • 時間がなくなる前にできるだけ多くの問題に正解しよう ゲームの特徴 • シンプルで直感的に遊べるクイズゲーム • 初級・中級・上級の3つの難易度に挑戦可能 • 制限時間内にスコアを競うスピード感のあるルール • 全国ランキング機能で他のプレイヤーと競争 • 和風デザインと心地よいBGMで集中できる環境 こんな人におすすめ • 脳トレゲームが好きな人 • 数学力・暗算を鍛えたい人 • 素数が好きな人、または学習中の人 • シンプルなクイズゲームを楽しみたい人 • ランキングで競争するのが好きな人 今すぐダウンロードして、分解スピードに挑戦しよう。

About

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.

Highlights
  • Identify prime numbers
  • Timed challenges
  • Global leaderboard
  • Multiple difficulty levels
  • Combo score multiplier
  • Training mode
  • Dark/Light theme
Features
Read 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

素因数分解クイズ4 screens
Prime Nerd4 screens

Verdict

The call

素因数分解クイズ and Prime Nerd are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

素因数分解クイズ ships an update every 5 days, Prime Nerd every 3 days. The most recent releases landed on October 6, 2026 and October 11, 2026 respectively.

ScorecardNo meaningful differences
素因数分解クイズ versus Prime Nerd: the parameters behind the verdict, then further details
Parameter素因数分解クイズPrime Nerd
PriceFreeFree
Positive reviews—0.0% of reviews
Update frequencyEvery 5 daysEvery 3 days — better
AdsYesYes
In-app purchasesNoNo
Monetization—Ad-supported
DevicesiPhone, iPad — betteriPhone
Requires iOS16.6 — better17.0
Further details — not scored
Size26 MB50 MB
Age rating4+4+
DeveloperYUKI WATANABEHiroki Sekimoto

In-app purchases

None

素因数分解クイズ

No in-app purchases

None

Prime Nerd

No in-app purchases

Questions

Is 素因数分解クイズ free?
素因数分解クイズ is free to download, with no in-app purchases.
Is Prime Nerd free?
Prime Nerd is free to download, with no in-app purchases.
Do 素因数分解クイズ or Prime Nerd have ads?
Both 素因数分解クイズ and Prime Nerd show ads.
Which is updated more often, 素因数分解クイズ or Prime Nerd?
素因数分解クイズ ships an update every 5 days, and Prime Nerd every 3 days. Most recently, 素因数分解クイズ was updated on October 6, 2026 and Prime Nerd on October 11, 2026.

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