Congratulations on the launch! Others have mentioned about Search, In case you choose to implement it then I'd suggest a special attention towards code search.

Congratulations on the launch! Others have mentioned about Search, In case you choose to implement it then I'd suggest a special attention towards code search. I presume formatting code with markdown is a non-issue, So implementing first class code search capabilities would be real differentiator among other notes applications and could likely fill a need-gap.