When you join Harry Potter and the Sorcerer's Stone™ you will have the opportunity to select your Hogwarts™ House. You can also choose to skip this step and and revisit it later.

If you need help choosing your house, there is a Sorting Hat website which you will find linked within the App.

Choosing a house in the App is a one time option and you cannot change this house for the duration of the challenge series.

If you do select a house you App experience will have some elements that are themed to match your house. If you don't choose a house you will either not see this themed element or it will be Hogwarts™ themed.

Choosing a house also means that your house points that you earn will be assigned to your house.