STEALTH Calculator : Eyes Free, Touch typing calc app at App Store analyse

App power index: 210 (based on ranks around App Stores today)
Utilities Productivity
Developer: Masaaki Nagasawa
Price: 0 free
Current version: 1.2.0, last update: 7 years ago
First release : 28 Aug 2014
App size: 10.45 Mb
4.0 ( 6800 ratings )
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Estimation application downloads and cost

> 4.62k
Monthly downloads
~ $ 1.89k
Estimation App Cost


* The worlds first (maybe) Calculator app that can just flick all operations
* And read the calculation results in voice and sound, vibration corresponding
* Can be operated to turn off the screen by "stealth mode” (black screen mode)

You must be honest training, to get used to :-(

But, it might be super comfortable If you get used :-)


[how to calculate]
Please have the image of a “abacus".

You can input numbers in the flick up and down by one digit.
And flick left and right , input operators (× ÷ = - +) .
All you do is this.


Making it possible to work with only the movement of the finger, you can “touch typing" input without looking at the screen.

There is no doubt that you help to calculate the while looking at the documents!

In addition, the rate of registration such as the discount rate at the time of the bargain and consumption tax can be, tax calculations when shopping, discount calculation is OK in the eyes free.

Since she can without looking at the screen and is equipped "dark mode" is also (calculated stealth mode) and take the plunge.

Why do not you surprised everyone by a to "pretend that mental arithmetic" the superbrain formula?

You can type pretty quickly if you get used!
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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,