Tapbots, the developer behind the popular third-party Twitter app Tweetbot, have launched a revamped version of their calculator app, Calcbot. The new version of the app has been completely revamped for iOS 8, and is available as an update to those that already own the current version of Calcbot.

In addition to the new look, Calcbot 2.0 brings along a number of new features. The old memory keys system has been thrown out for the new favorites system, which is easier to understand. The familiar history tape remains, and is now visible in portrait mode alongside the calculator. Your history tape will also now sync across your iOS device, as well as Calcbot for Mac. You can now also get instant access to scientific constants.

Calcbot also comes with a number of pro features, which can be unlocked with a $1.99 in-app purchase. Pro features include unit conversion, which lets you convert over 500 units in 22 categories like temperature, currency, and weight, features previously found in the developer's Convertbot app. Swipe to the right on the central calculator display to access unit conversion. You'll also have access to unlimited history tape, a special pro theme, and customizable constant values.

In addition to the Pro features, there are also two theme packs available for purchase at $0.99 a piece, each featuring multiple themes. Calcbot 2.0 itself is free to download for iPhone and iPad, and is rolling out on the App Store right now for devices running iOS 8.1 or later.