The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From Su, Ching-Ko:
Using CalcQX, no longer double checking the answer by doing the calculation again! Standard Mode: Works like the way billions of real standard calculators in the world do.Engineering Mode: Capable of doing complex scientific calculation, but remains easy-to-use as a standard calculator. Large buttons, easy-to-use, and the most important, it's free. CalcQX gives you seamless calculation experience like a real calculator you used in daily life.CalcQX is a general purpose calculator designed to meet daily calculation requirement with easy-to-use, fully reversible, convenient memory slots, and beautifull, info-rich display. The free version of CalcQX, CalcQX Lite, is released on the APP Store. Start your trial now!CalcQX Lite features:* Support both iPad and iPhone, one download for all your iOS devices* iPad/iPhone/iPod Retina display ready for vivid and elegant image* Up to 50 memory slots for historical calculations/expressions* Delete button to correct numbers* Swipe-right to undo, swipe-left to redo step during calculation* Jump into any step of calculation to modify operator or operand* Info-rich display* Scientific function support.* Percent button will behave like real calculator* More great features, but even easier to use than build-in calculator. You will love it!Full Version Upgrade for:* 4 additional memory slots (M1 ~ M4) for calculation (Tap-and-hold or M+/M- to memory the number currently shown on the screen and tap again to recall)* Reusable expressions/results* Clipboard/email support.Follow us on Facebook:http://www.facebook.com/pages/CalcQX/171355629551053