Game2by2 at App Store analyse

App power index: 100 (based on ranks around App Stores today)
Games Education Educational Strategy
Developer: Peter Erno Eso
Price: 0 free
Current version: 1.3, last update: 7 years ago
First release : 31 Mar 2016
App size: 10.28 Mb
4.6 ( 1696 ratings )
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Estimation application downloads and cost

> 2.2k
Monthly downloads
~ $ 900
Estimation App Cost


This app helps you discover Nash equilibria (mutual best responses) of 2x2 normal form games. It is not an equilibrium solver, however - you need to know where to look.

Select a pre-defined game from three classes (dominance solvable, coordination, and all other games, including ones with infinitely many mixed equilibria), or pick randomly-generated payoffs. The payoff entries are editable, so you can make up your own game as well. Use mixing sliders to control the players’ strategies. The expected payoff of a player’s best response is highlighted in red next to the best-reply strategy row or column.

Press the button “Is it Nash?” to see if you have found a Nash equilibrium. Two additional buttons, “RowMix” and “ColMix,” which set Row’s mixing so that Column is indifferent, and vice versa, may help you find mixed Nash equilibria. Another button highlights pure-strategy best-reply payoffs within the game matrix itself. Clicking on “Hint” presents information about the game currently displayed.

A "Help" button in the top-right corner shows more detailed instructions and discusses ideas to take-away from this app.

Send comments to [email protected]. Thanks to Renana Heller for her help in coding.
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Available in countries
Country Price
Canada free
China free
France free
Germany free
Italy free
Netherlands free
Portugal free
Spain free
Poland free
UK free
India free
Japan free
Korea, Republic Of free
Poland free
Russia free
Turkey free
USA free
Korea, Republic Of free
Ukraine free
Available for devices
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, iPad611, iPad612, iPad71, iPad72, iPad73, iPad74, iPhone8, iPhone8Plus, iPhoneX,