I have been reviewing the latest GPS enabled watches on the market. Is there a watch where a family member could track your progress on the AT through its GPS capabilities? My Apple iPhone has the "Find My Friends" app but was useless as I could not receive a signal for about 90% of my recent Section Hike. Secondly, what would be your recommendation for a new gadget watch? ( I have a 6 year old Casio ProTrek and looking to upgrade.)