A:Answer I was you a month ago... :)
SE was a step up on the features than the 3, plus a little bigger screen. I also am an Apple user, was unsuccessful with a few different FitBits over the years. So far, I like my SE. Mine is a GPS only version & I am glad I switched. I made sure to buy a screen protector thing at least when purchasing the watch. I get almost 2 days on a full charge with this. Biggest thing for me, no more FitBit pausing workouts bc of where the button is!!! Yay.