ガチ素因数分解 vs Root Drop
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
ガチ素因数分解
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「素因数分解」がゲームになった! 素因数分解の限界に挑戦してみよう! 操作は簡単! 表示される数を素因数分解して式を入力するだけ! 正解ならその数字分のポイントが加算され、不正解だと逆に減算される。 制限時間は90秒! 君はどこまで素因数分解できるかな?
Root Drop
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A fresh take on falling-block puzzles: every block that drops is a √ (square root). Drop a √ onto another √ to multiply them. When an integer can be extracted, the result splits into an integer below and the remaining √ above. Matching integers connected horizontally or vertically merge into a power block. Two 3s make 3²; add another 3 to make 3³… Keep the chain going to grow bigger numbers. FEATURES • Simple rules built around √, with deep number strategy • Your score is revealed at game over, with a breakdown of how many points each number earned • Share your results with an image of the board • A Collection of all the powers you’ve made • Choose your difficulty (Easy / Normal / Hard) and controls in Settings • Game Center leaderboards for each difficulty, plus achievements • Light and dark themes • Available in Japanese, English, Chinese (Simplified and Traditional), Korean, Spanish, French, and German Discover the satisfaction of watching your numbers grow.
Screenshots
Verdict
The clearest difference is iOS requirement: ガチ素因数分解 at 15.0 against Root Drop's 17.0. On price, update cadence, 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. ガチ素因数分解 sells 5 one-off in-app purchases and Root Drop sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
ガチ素因数分解 ships an update every 3 weeks, Root Drop fortnightly. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.
| Parameter | ガチ素因数分解 | Root Drop |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (23 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 23 — better | — |
| Update frequency | Every 3 weeks | Fortnightly — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 100 MB | 9 MB |
| Age rating | 12+ | 4+ |
| Developer | Chikai Ito | Naoki Chiba |
In-app purchases
ガチ素因数分解
- コイン150枚$0.99
- コイン400枚$1.99
- コイン1000枚$2.99
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- 広告削除$4.99
- コイン2700枚$6.99
Root Drop
- Remove Ads$1.99









