[tkainrad]

I see your point and I wouldn't mind having something like that. However, much of KeyCombiner requires a database. It stores practice results, personal collections, you can change a lesson's combinations etc.

I feel like if I tried to do a demo mode without storage anonymous users would be left with a 2nd class experience and potentially think less of KeyCombiner.

However, there's already lots of things that anonymous users can do: Browse all public collections, courses, and lessons. Use the practice demo on the home page. Search through KeyCombiner's entire database of public shortcuts. And more.

[gregsadetsky]

Why not let “semi” anonymous users — i.e. they’d be identified by a session cookie, but you wouldn’t know their email - use your database and store a bit of info there, but limit what they can do at the application level i.e. don’t let them complete more than 3 lessons for instance?