You can change your apps pricing plans at any time for various reasons. For example, changes in pricing can be made to align with the marketplace, or after adding new features, or if you want to increase or reduce your prices.
30-day notice period: As per section 9.1 of the App Market Partner Agreement, you need to give us a minimum of 30 days' notice if you're making any changes to your pricing plans.
To change the pricing plans of an app already live on the Wix App Market:
To remove a pricing plan of an app already live on the Wix App Market: