Comparison

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.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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!

About

イニシャルクイズ

Features
Read full description

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

Concentration Game, 9Bubbles3 screens
イニシャルクイズ3 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
Concentration Game, 9Bubbles versus イニシャルクイズ: the parameters behind the verdict, then further details
ParameterConcentration Game, 9Bubblesイニシャルクイズ
PriceFreeFree
Rating4.5 (45 ratings) — better—
Positive reviews54.5% of reviews — better20.0% of reviews
Number of ratings45 — better—
Update frequencyEvery 10 days — betterEvery 5 weeks
AdsYesYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.011.0 — better
Further details — not scored
Size43 MB143 MB
Age rating4+4+
DeveloperLisfee, Inc.FUKUROU

Customer experience

Concentration Game, 9Bubbles

All ratings45 ratings
Positive84.4%
Neutral4.4%
Negative11.1%
Written reviews55 reviews
Positive54.5%
Neutral5.5%
Negative40.0%

イニシャルクイズ

Written reviews5 reviews
Positive20.0%
Neutral20.0%
Negative60.0%

In-app purchases

4 purchases

Concentration Game, 9Bubbles

One-time4
  • FEEL GOOD$1.99
  • TRY STAGE28$1.99
  • 10 LIFEs$1.99
Show 1 more
  • DELETE ADs$1.99
None

イニシャルクイズ

No in-app purchases

Questions

Is Concentration Game, 9Bubbles free?
Concentration Game, 9Bubbles is free to download, with in-app purchases available.
Is イニシャルクイズ free?
イニシャルクイズ is free to download, with no in-app purchases.
Do Concentration Game, 9Bubbles or イニシャルクイズ have ads?
Both Concentration Game, 9Bubbles and イニシャルクイズ show ads.
Which is updated more often, Concentration Game, 9Bubbles or イニシャルクイズ?
Concentration Game, 9Bubbles ships an update every 10 days, and イニシャルクイズ every 5 weeks. Most recently, Concentration Game, 9Bubbles was updated on October 14, 2026 and イニシャルクイズ on October 12, 2026.

Other comparisons