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App power index: 277 (based on ranks around App Stores today)
Games Education Educational Puzzle
Developer: shuhei iwakiri
Price: 0 free
Current version: 2.1, last update: 7 years ago
First release : 03 Aug 2011
App size: 9 Mb
4.2 ( 2412 ratings )
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Estimation application downloads and cost

> 6.09k
Monthly downloads
~ $ 2.49k
Estimation App Cost


Recently, Have you thought that the brain became hard?
This application rounds your hard brain.

For example, its assumed that the question of "1+3" is coming out and there are "4" and "8" in choices of the answer.

"4" is an answer,right?
But,Its not correct answer in this application.
In this case, please choose "8".

Next, its assumed that the question of "5+4" is coming out, and there are "3" and "9" in choices.

Then, is the answer "3"?

No, please choose "9" in this case.

If its coming out except question of answer 9,please select wrong answer.
Otherwise,You selects "9"(correct answer).

Im Sorry...
I cant speak English well...


Have a good time!
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Available in countries
Country Price
Canada 1.39 CAD
China 6 CNY
France 0.99 EUR
Germany 0.99 EUR
Italy 0.99 EUR
Netherlands 0.99 EUR
Portugal 0.99 EUR
Spain 0.99 EUR
Poland 0.99 EUR
UK 0.99 GBP
India 80 INR
Japan 120 JPY
Russia 75 RUB
Turkey 3.49 TRY
USA 0.99 USD
Korea, Republic Of 1.09 USD
Ukraine 0.99 USD
Available for devices
iPhone3GS, iPadWifi, iPad3G, iPhone4, iPodTouchThirdGen, iPodTouchFourthGen, iPad2Wifi, iPad23G, iPhone4S, iPadThirdGen, iPadThirdGen4G, iPhone5, iPodTouchFifthGen, iPadFourthGen, iPadFourthGen4G, iPadMini, iPadMini4G, iPhone5c, iPhone5s, iPadAir, iPadAirCellular, iPadMiniRetina, iPadMiniRetinaCellular, iPhone6, iPhone6Plus, iPadAir2, iPadAir2Cellular, iPadMini3, iPadMini3Cellular, iPodTouchSixthGen, iPhone6s, iPhone6sPlus, iPadMini4, iPadMini4Cellular, iPadPro, iPadProCellular, iPadPro97, iPadPro97Cellular, iPhoneSE, iPhone7, iPhone7Plus,