Pros:

• OwnTracks is an open source application which is with a twist since it lets you track your location and even your previous travels or getaway
  -This application is completely free to download and use.
• it helps synchronization and estimation of time of arrival/meetup for those who plan to go outdoors or in a travel, thereby resulting to a more convenient and less hassle for users and its friends.

Cons:

None for this.