To create a group, you can go to the "Split it" section of the application's home screen, select "New Group", then set its name and select its members.
You will follow these steps:
1. Select "Split it".
2. Then select "New group"
3. Type the name of the group and if you want you can add a picture. Afterwards select "Continue"
4. Search for the person or people you want to add to the group and when you have added them you select "Create".