Binary 21 at App Store analyse

App power index: 120 (based on ranks around App Stores today)
Games Education Educational Strategy
Developer: FBMM
Price: 0 free
Current version: 1.1, last update: 7 years ago
First release : 14 Aug 2014
App size: 2.17 Mb
4.6 ( 7376 ratings )
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Estimation application downloads and cost

> 2.64k
Monthly downloads
~ $ 1.08k
Estimation App Cost


Binary 21 is a fun way to practice your binary number counting skills. Touch and drag to connect the numbers to match the target number.

If you get stuck you can shuffle the entire board, or flip a bit from 0 to 1 (or 1 to 0). But you only get one shuffle and one swap every time you get to a multiple of 21.

Heres a hint to get your started if youre not familiar with binary.

Decimal = Binary
0 = 0
1 = 1
2 = 10
3 = 11
4 = 100
5= 101
6 = 110
7 = 111
8 =1000
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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
iPhone4, 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,