“This is a great app. If you need a very versatile calculator then this is the one to get. It is an excellent product! Whether it is basic, scientific, or programming calculations, the CalcTastic calculator has got you covered. I have provided suggestions to the developer and received prompt, excellent responses. A well maintained app. I am running this on a Nexus One phone and a Motorola Xoom tablet. It works great on both platforms.”

“Calctastic does everything you need! Basic calculator to advance scientific functions to conversions for bit decoding. And intuitive interface makes it easy to work with and with a large stack even long complex functions become easy to handle. Well worth the price!”

“Very slick, and one of the few programmer/scientific calculators that look good on a 10″ screen. Even does fuel consumption conversions, which most dedicated unit conversion apps don’t!”

“Don’t waste your time with any other programmer’s calculator in the market, this is the best. Bar none.”

“Awesome calculator! Programming calculations are useful, and the dev has been constantly updating. Thanks!”

“I finally found the calculator I’ve been looking for ever since I bought my first smartphone 12 years ago. Just at the right moment, because my workhorse binary calculator will not work on Win 7. The primary attribute I’ve been looking for is the ability to input binary with a touchscreen (random access to bits), while displaying 32 or 64 bit data as nibbles. All the rest of the features are implemented just as intelligently. The best.”

“Bravo Great calculator; gets better with every update. Not many calcs can compete with this one.”

“Best Calculator on Google Play! If you need a robust calculator with a very solid ease of use, you cannot beat the quality and functionality of this app! I find myself using it daily and I never have any issues with it unlike other calculator apps I have tried in the past. Thanks ShayTastic Software!”

“Fantastic Calculator! Very versatile, accurate calculations and looks great. As good or better than RealCalc or any other free(or paid) scientific calculator. It even has conversions and statistical calculations too. I haven’t found a single hiccup or bug at all. Very nice!”