Scrinium is a private Markdown notebook: a real editor, real encryption, and a few things that are only possible when the server cannot read your notes.
Notes are encrypted on your device under per-note keys. The server stores ciphertext, an SRP verifier, and nothing it can read — no escrow key, no admin view.
A Typora-style editor that renders Markdown inline as you type, keeps Markdown as the stored format, and searches locally over decrypted notes.
Self-destructing notes shared as a link, with the key in the URL fragment so the server never sees it. Limit the views, set an expiry, or revoke it.
If you stop signing in, a trustee you nominate can recover your notes — using a 2-of-2 split key, so neither the server nor the trustee can open anything alone.
Unlimited notes, encrypted sync, unlimited devices, and the Markdown editor cost nothing and are not a trial. Paid tiers exist for the features that store data on the server or take real work to build: encrypted attachments, version history, burner notes, the Dead Man’s Switch, graph view, templates, math, and diagrams.
The reasoning is simple. A private notebook whose free tier is a countdown teaches people that privacy is the premium add-on. Here the encryption is the baseline and the extras are the upgrade.