Launch your iPhone's default Chat, with your group of contacts (upto 20) pre-populated.
At your hiking breaks create a 1-page article - of your fav moments in the trip - in Routespunkt Hiking Grid Diary. Share the article with your friends / family / dear one - anyone who wished they could be there in the trip, but could not make it.
Share pics of serene mountain-top viewpoints with friends visiting perhaps a different hiking trail. Ask to see their adventure pics!