https://wccftech.com/todays-list-of-paid-apps-and-games-that-are-free-at-the-play-store-including-multi-screen-voice-calculator-and-more/

? Standard & Advanced Scientific Calculator

? Re-usage of previous calculations, just reference a constant that was created for your convenience

? User defined arguments, as simple as x = 2

? User defined functions, as simple as f(x) = x^2, f(x,y,…)=2*x+y

? User defined random variables, as simple as rand X = rNor(0,1)+1

? Beautiful function graphs, set variables, range, expression, interact with the chart!

? Scripts writing, personalize and automate you work!

? Rich set of examples built-in in the app!

? Work saving and results sharing

Download Scalar Pro — Advanced Calculator & Math Scripts