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 ...

Musixmatch for iPhone – Know what your music is all about

Knowing a song's lyrics can add much more feeling to the tune. Unfortunately, it's not always easy to understand what the vocalist is saying. That's where Musixmatch steps in. The service claims to house the largest collection of official song lyrics. Launch the app and whatever song is currently playing ...