A:AnswerThe apps for the watch have to be watch specific apps. Your phone apps will not work on the watch unless there is watch app that is similar to download.
A:AnswerWith the Bluetooth version, everything works independently except for calling/texting/anything to do with internet unless you're connected to WiFi, then you can use those features without your phone. You need the phone app to set your watch up and to view more details about your tracked health.
A:AnswerYes you can use the watch internationally.. I just recently went to the Virgin islands and it worked as if I was back in the states. I also went swimming in sea water with no issues.
