臓器ゲーム vs Prefecture Drop
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
臓器ゲーム
Merge identical organs to evolve them into larger ones. Aim for a high score by preventing organs from overflowing the beaker. Compete for the top spot on the score rankings.
- Organ merging and evolution
- High score chasing
- Score rankings
- Prevent overflow gameplay
- Simple puzzle mechanics
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同じ臓器をぶつけると臓器が「進化」していきます! どんどん進化させてより大きな臓器を目指そう! 臓器がビーカーから溢れないように得点を重ねて高得点を目指すゲームです。 スコアランキングで1位を目指しましょう!!
Prefecture Drop
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A falling-block puzzle made of Japan's 47 prefectures: pieces clear when real neighbors touch. The map of Japan has come apart. The land-pulling god lets the prefectures down into a box one by one. When two prefectures that really border each other touch, they join up and go back home (they disappear). Don't let the box overflow. HOW TO PLAY - Drag to aim, lift your finger to drop - Tap the left or right side to turn the piece - Neighbors that touch clear and score - When a piece that falls after a clear touches another neighbor, that's a chain: a 2-chain scores double, a 3-chain triple FEATURES - Every piece is based on the real shape of a prefecture (simplified for play) - Learn which prefectures border each other as you play - A map of Japan built from the pieces: check any prefecture and its neighbors - A short tutorial for your first game - Hokkaido and Aomori, and Okinawa and Kagoshima, also count as neighbors ADS An ad may appear at game over. The one-time "Remove Ads" purchase turns them off.
Screenshots
Verdict
The clearest difference is iOS requirement: 臓器ゲーム at 12.0 against Prefecture Drop's 15.0. 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. 臓器ゲーム sells 6 one-off in-app purchases and Prefecture Drop sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
臓器ゲーム ships an update every 4 days, Prefecture Drop every 5 days. The most recent releases landed on October 30, 2026 and November 10, 2026 respectively.
| Parameter | 臓器ゲーム | Prefecture Drop |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| Update frequency | Every 4 days — better | Every 5 days |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 117 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | 株式会社Loxarc | Shoya Kurokawa |
In-app purchases
臓器ゲーム
- コイン100$0.49
- 広告非表示$1.99
- コイン600$2.99
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- コイン1500$6.99
- コイン3200$12.99
- コイン9000$34.99
Prefecture Drop
- Remove Ads$2.99
Questions
Is 臓器ゲーム free?
Is Prefecture Drop free?
Do 臓器ゲーム or Prefecture Drop have ads?
Which is updated more often, 臓器ゲーム or Prefecture Drop?
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