Im trying the free version of Calc- before buying the premium edition. I like the idea of a calculator on my watch with the ability to do unit conversions as well. It includes a tip calculator and a check divider for those times you cant do it in your head. Would have easily been 5 stars, but I had to deduct a star for spelling. One of the features of Calc- is a record of calculations called "Wach History". Im guessing that thats supposed to be "Watch History". If they missed this in testing, what else is lurking that we cant see?