You can add friends on Gathr several ways.
Head to the profile section of the app, tap Friends, and tap on Add friend. You are able to search for people by their username (@) or their full name.
There will be times where you encounter people in plans that you meet for the first time. To add them as a friend, simply head to the details page of a plan and tap the add friend icon.
You can chat with people who are included in any plans you are invited to or any circles you are a part of, regardless of friendship status.
If you wish to become friends with someone in one of your plans, simply tap the Add Friend icon next to a users name on the plan details page