Comparison

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.

Head to head
About

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.

Highlights
  • Organ merging and evolution
  • High score chasing
  • Score rankings
  • Prevent overflow gameplay
  • Simple puzzle mechanics
Features
Read full description

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!!

About

Prefecture Drop

Read full description

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

臓器ゲーム4 screens
Prefecture Drop4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard1 real difference · 7 level
臓器ゲーム versus Prefecture Drop: the parameters behind the verdict, then further details
Parameter臓器ゲームPrefecture Drop
PriceFreeFree
Positive reviews100.0% of reviews—
Update frequencyEvery 4 days — betterEvery 5 days
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size117 MB26 MB
Age rating4+4+
Developer株式会社LoxarcShoya Kurokawa

In-app purchases

6 purchases

臓器ゲーム

One-time6
  • コイン100$0.49
  • 広告非表示$1.99
  • コイン600$2.99
Show 3 more
  • コイン1500$6.99
  • コイン3200$12.99
  • コイン9000$34.99
1 purchases

Prefecture Drop

One-time1
  • Remove Ads$2.99

Questions

Is 臓器ゲーム free?
臓器ゲーム is free to download, with in-app purchases available.
Is Prefecture Drop free?
Prefecture Drop is free to download, with in-app purchases available.
Do 臓器ゲーム or Prefecture Drop have ads?
Both 臓器ゲーム and Prefecture Drop show ads.
Which is updated more often, 臓器ゲーム or Prefecture Drop?
臓器ゲーム ships an update every 4 days, and Prefecture Drop every 5 days. Most recently, 臓器ゲーム was updated on October 30, 2026 and Prefecture Drop on November 10, 2026.

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