Waltz -- a native calculator in a "smart scratchpad" at Mac App Store analyse

App power index: 100 (based on ranks around App Stores today)
Utilities Productivity Education
Developer: DouWère, s.p.r.l.
Price: 0 free
Current version: 2.0, last update: 8 years ago
First release : 27 Feb 2015
App size: 2.23 Mb
4.2 ( 2912 ratings )
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Estimation application downloads and cost

> 2.2k
Monthly downloads
~ $ 900
Estimation App Cost


Waltz gives you a “smart scratchpad”.

Waltz let you type, delete, or modify text in a scratchpad, like any text editor... but, when you press the return key, Waltz invokes an interpretor to evaluate the line you typed in, then inserts the result, just below.

For example, if you enter 1 + 2 and press the return key, a 3 appears.

What makes Waltz unique, when compared to so many other calculators, is its deep respect of the new iOS philosophy, focusing on usability, moving away from skeuomorphic designs (which mimicked real objects). You just see what you asked, and the replies... touch to edit, then re-evaluate !

Behind this simple appearance, Waltz is also the only app giving an easy access to one of the most powerful component of iOS : JavaScriptCore — until now, mainly used by Safari. Like web pages, Waltz is extensible at will, without any specific learning... by just checking a box in a list.

So, whether you just need to quickly check a bill, get the total cost of a loan, or even analyse the electrical behaviour of a linear circuit, Waltz is the only tool you need.
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Available in countries
Country Price
Canada 3.99 CAD
China 18 CNY
France 3.49 EUR
Germany 3.49 EUR
Italy 3.49 EUR
Netherlands 3.49 EUR
Portugal 3.49 EUR
Spain 3.49 EUR
Poland 3.49 EUR
UK 2.99 GBP
India 249 INR
Japan 360 JPY
Poland 13.99 PLN
Russia 229 RUB
Turkey 12.99 TRY
USA 2.99 USD
Korea, Republic Of 3.29 USD
Ukraine 2.99 USD
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,