Although I’m a little torn on the name, Buncee offers a drag and drop interface for creating multimedia. The projects can then be view-able on the web or on the iOS apps.
The gallery has some great examples of seeing how you could use the tool in your classroom. While there is a free tier, to unlock all of the features will cost $20 a year. The full version gives the teacher access to classroom organization tools and assignments. For students it’s free, although students will have to create an account (Buncee doesn’t offer alternative log ins such as Google or Microsoft 365).