Calculate+4 -simple calculator at App Store analyse

App power index: 100 (based on ranks around App Stores today)
Utilities Productivity
Developer: Rooking,Inc.
Price: 0 free
Current version: 1.0.5, last update: 4 years ago
First release : 05 Jun 2019
App size: 22.58 Mb
4.2 ( 7952 ratings )
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Estimation application downloads and cost

> 2.2k
Monthly downloads
~ $ 900
Estimation App Cost


I made the concept that, want to use a calculator on a tablet and also want to use a calculator with a simple design.

The buttons are large and easy to touch, and have a simple design. In calculator + 4 we put four calculators on one screen when we turned horizontally.

I think that it is useful in various places if you have to do simultaneous calculation.

[Major features]:
-Simple and easy design
-The button is large and easy to touch
-When turned horizontally, equipped with four calculators can be calculated simultaneously
-For portrait orientation, delete the rightmost value with backspace button
-Percent calculation also possible
-Supports both vertical and horizontal display
-Display comma (,) in every three digits for easy reading of calculation result

Supported Operators:
-Basic operations: +,-, x, ÷,%
-+/- conversion

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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
UK free
India free
Japan free
Korea, Republic Of free
Poland free
Russia free
Turkey free
USA 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, iPad75, iPad76, iPhoneXS, iPhoneXSMax, iPhoneXR, iPad812, iPad834, iPad856, iPad878, iPadMini5, iPadMini5Cellular, iPadAir3, iPadAir3Cellular, iPodTouchSeventhGen, iPhone11, iPhone11Pro, iPadSeventhGen, iPadSeventhGenCellular, iPhone11ProMax, iPhoneSESecondGen, iPadProSecondGen, iPadProSecondGenCellular, iPadProFourthGen, iPadProFourthGenCellular,