Sleep time in minutes instead of fractions
Seeing something like "7.7 hours" makes no sense to me. We count time in minutes, quarters and halves, I'd much rather see the exact time I intend to sleep through the night. Trying to figure out 7/10 times 60 is unnecessarily cumbersome.
Plus take away all the percentages and just indicate hours and minutes. Other sleep trackers do this and it is much easer than getting out the calculator every morning.
I agree, I suck at math.