With one of the lastest android versions, it's so broken it can't send in a problem report. It only operates in landscape, except, now it doesn't work all. Changing modes doesn't work: Scientific mode shows the equal sign and calculations are numerically incorrect. Please say it's not an orphan a d you're going to fix it.
Very slow. Can't see graph. No complex numbers. Not good.
Nice Calculator, but takes forever to load up.
Excellent scientific calculator with expressions, fractions, repeating decimals.