The mmenu WordPress plugin is free to use for personal or non-profit usage. You can purchase a license if you want to use it in a commercial project (including sites, themes and apps you plan to sell).
Before purchasing a license, please make sure the mmenu WordPress plugin is suitable for your project. You can do this by downloading the free version and purchasing a license later on.
By purchasing ONE "Multiple websites license", you are allowed to include the mmenu WordPress plugin in ONE product (for example a plugin, theme or template) for sale. Customers and users of your product do not need to purchase their own license.
Be sure to download this Sketch file if you want to integrate mmenu in your webdesigns.