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Calc is an easy to use, beautifully packaged calculator, includes both a standard and scientific calculator, best calculator for your iPad, iPhone and Apple Watch!Features:* Live voice calculator* Add notes to history of your calculations, and you can share* Choose between a basic calculator or scientific calculator with more than 30 scientific operations * Use both calculators in portrait or landscape mode (both iPhone and iPad), and split screen support for iPad* Auto adjust height of the history list, no matter how long the calculation process can be displayed in full* 20 beautiful themes for you to choose, unlock them for free by watching an ad!* Full watchOS 3 support* Support iOS 9 and later spotlight searchUnit Converter:* Over 690 units in 31 categories.* Allows you to add your own unit data, make your own unit converter that meets all your requirements.* Support more than 150 kinds of currency, conversion exchange rate automatic updates* The simplest way to create and use favorite lists.* Add the constant value of your frequently used, it can easily and quickly reused.* Flexible search feature that lets you quickly find what you want the unit and automatically saves your search history.Basic functions:* Big button layout * Backspace key * View and edit a history of your calculations on the History Panel* Multiple Button sounds, and button sound is mutable URL schemes: Calc://Download it now and feel of this calculator is how classic