Calculator # 4+

Before retiring I was An intercontinental ballistic missile designer. Mathematical calculations were my daily bread and butter. This calculator can do, for free!, what our most expensive calculators could do. I am amazed that such a powerful calculator is now being offered at no cost to anyone who needs a small hand-held calculator. Thank you so much for making this calculator available. I highly recommend this calculator. (The only down-side to this calculator is that it does not use reverse-Polish notation which requires fewer key strokes. But no one uses reverse-Polish nowadays anyway, much less knows what it is.)

Just wanted to say thanks for holding off the ads until I had used this app for a week or two. Great little piece of technology. Bought the infinity calculator earlier today ... Looking forward to it being worth the purchase. Gotta say, those full page ads were super annoying, but I get it. You made this thing a demo for the infinity, which is still CHEAP. Thanks, developers. I hope you carry on well.

As a current trigonometry student, a good calculator to use out of class is a must for me, and I think I’ve found mine! It has a wonderful setup that is easy to navigate. I would heavily recommend it to anyone that can’t afford a standard graphing calculator with the exact same functions (minus graphs, of course) and just needs something to use with quick, at-home assignments.