I seem to constantly collect calculator apps, but it might be good to finally settle on one and uninstall the rest.
One that looks nice, easy to use (ex. vibrates on keypress), and has advanced options that can be accessed as needed?
I was mostly using “Natural Scientific Calculator” as the non-FOSS option till now
A lot of these (opencalc, yetcalc) look similar, and so does Unitto, but so far this one seems the best so far.
It has more theme options, lots of conversions, and the haptic feedback feels natural enough to me :)