Calzy, one of my favorite iOS calculators, has been updated to version 2.0, which brings several new features and design changes over the old version. I reviewed Calzy in May 2013, shortly after the app had been released on the App Store, and I appreciated its clean design and gesture-driven interactions:

I use Calzy because it blends powerful features with delightful gestures and animations. For instance, the app comes with full undo/redo support: to activate this, you can swipe right or left, respectively. If you want to clear an entire expression quickly, you can tap & hold the backspace button. And – my favorite feature – if you need to edit, not just view, single items in the current expression, you can tap & hold on the display to bring up the expression editor (with another sweet animated transition). From the editor, you can swipe to delete numbers or use a button in the top left to achieve the same functionality.

Calzy 2.0 is a free update that brings a new design for iOS 7, which isn’t dramatically different as it makes numbers thinner, brings some lightweight blurring in certain parts of the UI, and introduces themes – which I like (especially the Dark + Gold setting, pictured above). The expression editor has been revamped so you can easily reorder values in the expression, and the app has currency rounding available by tapping a button below the number pad. My favorite addition, though, is the ability to bookmark calculations with a note: tap & hold the equal sign, type a note, and a bookmark will be added (with a nice animation) and saved. Bookmarks have their own section in the History view, and I find this particularly handy to save how much I’ve spent while grocery shopping and access previous notes at any time.

Calzy 2.0 is a nice update that adds new functionality without compromising the app’s simple approach. Calzy is $0.99 on the App Store.