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.

PCalcTLA Systems Ltd.Utilities$9.99Download

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

Do Button by IFTTT – Do it all right from your Today Screen on iPhone and iPad

"If this then that" is a service that connects many of your online accounts to each other. So, if it's raining out, IFTTT will tell your internet connected home lights to turn on. That's just one example, of the various things that the service will do. In fact, IFTTT is ...

Yahoo Weather – A refreshing look at your current conditions

Surprisingly Yahoo has made a fantastic iPhone and iPad app for weather. What’s great about Yahoo Weather is it’s user interface. The app gives you a nice forecast of daily and nightly weather with written descriptions of rain and snow accumulations, a feature lacking in many weather apps. The app ...