I use a physical calculator for two reasons: - actual (not simulated) haptic/tactile feedback - I don't want to pull out my phone/laptop to do the non-trivial

I use a physical calculator for two reasons: - actual (not simulated) haptic/tactile feedback - I don't want to pull out my phone/laptop to do the non-trivial math I also do mental math, making sure that what I'm calculating is in the right ballpark