Are Add-Ons offered every month? The Add-Ons store opens every month except on PopUp months. The PopUp store takes place every 3 months. 💞🛍 Related articles How many Add-Ons can I purchase? What products are available to order as Add-Ons? How much do Add-Ons cost? When is the next Add-Ons store? What are Add-Ons?