Perhaps is useful for users and dev if we have all the comments, troubles, issues, etc. in a group for easier find information about this great, useful field software that Arthur starts and share with all of us, and now have the 3DR support.
(If another group exist, please tell me and I erase, I couldn't find)
Here yow can download https://play.google.com/store/apps/details?id=org.droidplanner.android
Here you can find more information :https://github.com/DroidPlanner/Tower
Here you can find FAQ: https://github.com/DroidPlanner/Tower/wiki/FAQ
Here a video tutorial in english and spanish thank's to Joey and Kit drone