It depends on what you want to build. Fulcro is a client application library. Biff is more like a server-side template with some utility functions.

Aslo question of how much experience you have with cljs and frontend dev. If not that much then Biff might be a much easier choice. I guess @UQ5QFFX54 could tell you how it is for a new Fulcro developer trying to build real stuff.

@U0522TWDA I was thinking a lot about this biff vs Fulco (I don't know much about biff except a few lines on web site). I like that in Fulcro view is generated from client database. Without client database and elegant backed front-end communication I would not start a new app. In my opinion it is more question how to set up a team to work on the app, it would be nice to have some experienced developer on board or mentor/consultant near by. So with you as consultant or even Tony, Fulcro is very attractive option.