PCalc if one of the best calculator apps available for iPhone and iPad. Now it presents a quick access calculator to the Today screen. This widget is just one facet of the premium calculator app. If you find yourself constantly making calculations, unit conversions, even solving scientific equations, PCalc is the widgetized app you need.

PCalc is just one of our favorite widgets for iPhone and iPad. We’ve collected all of our favorites here. And if you’d like to see more of our top app selections in different categories, just head on over to our Best Apps Series.

PCalc - The Best CalculatorTLA Systems Ltd.Utilities$9.99Download

Here are a couple of our other picks of the best widgets for iPhone and iPad:

Dark Sky – The Best Rain and Snow Alert App for iPhone and iPad

There are a flurry of weather apps for the iPhone and iPad. But the problem is that most these apps require you to keep checking them for updates. Dark Sky, on the other hand, comes to you. How so? Dark Sky's killer feature is alerting you when it is going ...

Launcher – Access any app from your Today Screen

Launcher with Notification Center Widget was originally released back in September 2014 but was quickly pulled by Apple from the App Store. This was due to the app's awesome ability to launch other apps right from your Today Screen. But Apple has had a change of heart and Launcher is ...