Pricing
Bring your own key. Use for free.
Since the whole app is bring your own keys (which are encrypted), the only cost I have is hosting. It currently costs <$50 to host this whole app (two instances, one for the database, one for the api, frontend, and workers).
What you see on the hosted site is the same code published on GitHub. Inspect it, fork it, or self-host it. Nothing important lives only behind our domain.
If there's new functionality and increased usage that needs more resources from my end, I'd come up with pricing (with enough notice). For now, use it for free.