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:

Deliveries – The best way to track packages on your iPhone and iPad

Deliveries is our favorite package tracking app. Anytime you order something online and you get a shipment or tracking number, simply paste it into Deliveries and watch the package route its way right to your house. Now Deliveries has a widget so you can watch all this and get alerts ...

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 ...