If you are looking for a simple, stylish, and highly functional calculator app for the iPhone and iPad, we think you should check out Calcbot. You have an interface that is very appealing and fluid, and you can swipe to pull up a register of your work, and can even pull results from the register into equations. The best part, though, is that Calcbot is a universal app (which means you buy it once, and you get both the iPhone and the iPad version) that costs just $0.99. Seriously, a buck for a great iPhone and great iPad app? Don’t mind if we do.