yeah, I'm using Nano S to store my ZEN right now. I was wondering if app for Blue will be developed or not. I got a word from one of the admin, that it will likely to be implemented.
If I am correct you can't use the Ledger Blue with Zencash. But you can with the Ledger Nano S and the specific app for zencash
Ledger they would handle the Blue firmware, but need confirmation. Stay tuned.