CalcFast!

Fast calculator for iPad, iPhone and Apple Watch that shows the calculation History, includes a Today Extension that allows for fast calculation by swiping down and 3D Touch for quick interactions. Numbers are formatted for your country, i.e. period in the US and comma in Europe. The Key Clicks may be turned off in the CalcFast Settings.- When installing the Apple Watch App, wait while it installs, if it doesnt try again and allow it more time.