Negative Number Subtraction at App Store analyse

App power index: 100 (based on ranks around App Stores today)
Games Education Educational Family
Developer: King Wong
Price: 0 free
Current version: 1.6, last update: 6 years ago
First release : 16 Sep 2013
App size: 2.86 Mb
4.8 ( 7248 ratings )
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Estimation application downloads and cost

> 2.2k
Monthly downloads
~ $ 900
Estimation App Cost


Negative Number Subtraction is a Maths Quiz program specialising in the subtraction of negative numbers. It is designed for young children, but it is also challenging for adults as well. All quizzes in the program are system generated and can be fine-tuned to suit the users mathematical capability. As such, it is ideal as a training tool for anyone who wishes to improve their mathematical skills.

App Features:

* Arithmetics quiz for subtraction. Each quiz comes in three flavours: a) 10 - 2 = X b) 10 - X = -8 c) X - 2 = -8.
* "My Quiz" feature with a user-definable operand. The user can define a specific operand to focus on. E.g. Subtraction of -4.
* Random Quiz feature for randomized operands.
* Built-in Stop Watch to measure the users problem solving capability.
* Five user-selectable levels of difficulty.
* Performance monitoring for each difficulty level. Detailed performance statistics provided.
* All quizzes are auto-generated by the iOS device and randomized so there is a virtual unlimited set of possibilities.
* Universal App - works on iPhone and iPad devices.

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Available in countries
Country Price
Canada 1.39 CAD
China 6 CNY
France 1.09 EUR
Germany 1.09 EUR
Italy 1.09 EUR
Netherlands 1.09 EUR
Portugal 1.09 EUR
Spain 1.09 EUR
Poland 1.09 EUR
UK 0.99 GBP
India 79 INR
Japan 120 JPY
Korea, Republic Of 999.99 KRW
Poland 4.99 PLN
Russia 75 RUB
Turkey 6.99 TRY
USA 0.99 USD
Korea, Republic Of 1.09 USD
Ukraine 0.99 USD
Available for devices
iPhone3GS, iPhone4, 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, iPad611, iPad612, iPad71, iPad72, iPad73, iPad74, iPhone8, iPhone8Plus, iPhoneX,