When I ride alone I use "Road ID". It's a app on my iPhone that when activated, send a link to up to 5 people via... SMS or email, where they can go to and follow me. One of the features I like, you can set a stationary alert... If I'm not moving for set period of time, it will send a alert (they know where to come find me laying off the side of the road☺☺☺). If I'm out of cell coverage it saves the info and updates when back in cell coverage. It has some other features... may be something you could checkout. Google it, it might work for you.