I want to start using my Apple Watch (first-generation aka series 0) solely to tract fitness data (that is, not using it for any other purposes, such as music, messaging, etc.). I no longer use an iPhone as my daily phone, but I plan to keep an iPhone around only to be used to intermittently sync with the Watch to save my health data. Can't seem to find any reliable info on the net on how to do this correctly. Can someone offer advice on how to do this? In particular... - Is this correct that my Apple Watch can store locally fitness data for up to 30 days? If so, am I correct that I only need to turn on my iPhone once a month to sync the data from the watch? - I am not keen on using iCloud to backup my health data. Can I set up the Apple Watch and set up data sync LOCALLY with my iPhone entirely WITHOUT entering my Apple ID? - For backup, will a typical LOCAL iTunes backup of my iPhone (not iCloud backup) sufficient to back up ALL of my health data from the Watch so that if I ever need to restore my Watch or iPhone I would not lose my health data? - Any other pitfall I need to watch out when using my Watch in this limited fashion and restricted way?