A:AnswerGear OS is not compatible with iPhone with Samsung watches, this includes both Galaxy watch 4 and 5. There are only a select number of Gear OS watches compatible with Gear OS, not Samsung though.
A:AnswerMore features (especially health monitoring) and longer battery life and when i upgraded from the 3 to 4,i was very satisfied and found equal value to the increased cost
A:AnswerJust about any smart device using a simple HR Monitor like the Galaxy Watch is going to have occasional issues reading through dark tattoos. I would try out the in-store demo or take advantage of the return window and just purchase and return if it doesn't work for your situation. Best of luck!
