There’s nothing wrong with XL, It’s pretty, nice for a quickie add or subtract – But I expected more. There’s no pie!, no logs, no trig functions. Oh, thank my lucky stars, it was ON SALE! Let’s see, shall I sue if they round one-half of 99 cents in THIER favor? I just downloaded Sierra, and I didn’t realize it has Calculator.app, a perfectly-good calculator with everything I’ll need.