Once you have our app installed (iPhone or Android) if you are a Group Manager you can add members to your group right from the app. Just log in to the app and follow these screen shots...
1. Tap the menu in the upper right.
2. Tap the first item - Add Members to Group
3. Tap on "Choose a member" to select a member from a list. If you are not part of an organization that has purchased GroupValet, you will need to enter the email address of the members you want to add.