I use TrackMyTour which allows me to submit waypoints whenever I want. I can keep them offline to save battery or when there is no cellservice. I can set the resulting map private or public. Other than having to remember to set the points, it is reasonably painless. My wife and family can simply follow me on the resulting map.

But, this is an auxiliary usage as I like to create a plot of the route I've ridden, which is my real reason for using this.

I believe the first 2 maps are free. You have to pay a one-time fee to save more than 2 maps.