MathStudio Express

I paid for the offline version of this a couple of years ago and now they've replaced it with a completely different free app that requires internet access to work. And now they are offering the paid version as an entirely different app and asking me to pay for that again!

This was a great app I purchased years ago and was great. I recently had to reset my phone and it's been changed to basically a totally different calculator and I'm expected to pay again?? This was a 5 star plus app before this update, very disappointed.

This program out-performs all other graphing calculators in the app store as far as capability, symbolic calculation and graphics rendering. True, the GUI isn't all that "simple" or "intuitive"... But this isn't "Upset Pigeons" it's a scientific graphing calculator. Likewise, it's marketing more towards people who have a solid background in upper level mathematics and are looking for an app that will render, say, a Gaussian integral in ultra-crisp resolution and superbly accurate proportion, all while having the ability to smoothly manipulate its 4-dimensional (x,y,z,t) parameters on the fly, rather than another "deceptively simple", "easy to learn" app with "addictive game play". I would give it 5 stars, but an app this powerful really should have a means of quickly exporting its graphics, more efficient input & editing for vectors/matrices and include a more comprehensive support of complex variables.