Concentration Game, 9Bubbles vs イニシャルクイズ
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Concentration Game, 9Bubbles
This game challenges your memory and concentration by requiring you to memorize and recall the colors and positions of bubbles. Designed to improve cognitive skills and creativity, it offers increasing difficulty across 28 stages.
- Memorize colors and positions
- Burst bubbles based on memory
- Improves memory power
- Enhances creative ability
- 28 challenging stages
- Trains the right side of the brain
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This game will make you smarter and relieve your stress. It is easy at the beginning, but gets more and more difficult. Theoretically, only 1 player per 10,000 can beat all the stages. Let's try! ◆Game Rule◆ Rules are very simple. Memorize the "colors" and "positions" of bubbles which are displayed for only 3 seconds. After they disappear, use your memory, select bubbles and burst them. ◆Game Feature◆ Continue playing this game and you will see that your power of memory improves. The game does more than just improve your memory. Seeing colors is mainly handled by the right side of your brain which is said to control your creativity and intuition. Just by playing this game, you will be able to improve your creative ability. The game has 28 stages in total. If you beat all the stages, the right side of your brain will be able to handle more information than ever! There are many games which train the left side of the brain including Sudoku and other number puzzles, but there are not many games in the world which train the right side of the brain. Play this game, train the right side of your brain and make your everyday life full of creativity!
イニシャルクイズ
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パズルでみるみる脳力回復するよー(゚∀゚)ー!!  ̄^Y^Y^Y^Y^Y^Y^Y^Y^Y ̄ たとえば 『ほ』ではじまる野菜は、、ほうれん草! 『た』ではじまるスポーツは、、卓球! 『け』ではじまる文房具は、、消しゴム! 頭文字が合うパズルを見つけよう! 記憶力と思考力が鍛えらる! 子供から大人まで楽しめる簡単ゲームです。 エンジョイプレイ!
Screenshots
Verdict
The clearest difference is in-app purchases: イニシャルクイズ at none against Concentration Game, 9Bubbles's 4. Concentration Game, 9Bubbles's advantage is review sentiment (55% vs 20%) and update cadence (every 10 days vs every 5 weeks). On price, ads, 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. Concentration Game, 9Bubbles sells 4 one-off in-app purchases. イニシャルクイズ asks for nothing beyond the download.
Concentration Game, 9Bubbles ships an update every 10 days, イニシャルクイズ every 5 weeks. The most recent releases landed on October 14, 2026 and October 12, 2026 respectively.
| Parameter | Concentration Game, 9Bubbles | イニシャルクイズ |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (45 ratings) — better | — |
| Positive reviews | 54.5% of reviews — better | 20.0% of reviews |
| Number of ratings | 45 — better | — |
| Update frequency | Every 10 days — better | Every 5 weeks |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 43 MB | 143 MB |
| Age rating | 4+ | 4+ |
| Developer | Lisfee, Inc. | FUKUROU |
Customer experience
Concentration Game, 9Bubbles
イニシャルクイズ
In-app purchases
Concentration Game, 9Bubbles
- FEEL GOOD$1.99
- TRY STAGE28$1.99
- 10 LIFEs$1.99
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- DELETE ADs$1.99
イニシャルクイズ
No in-app purchases






