Sign in to your private vault. Your notes are encrypted on your device — nobody else, including whoever hosts this server, can read them.
Two separate secrets, on purpose: a login password (just controls access to the app) and a vault passphrase (the only thing that can decrypt your actual notes — nobody else ever sees it, not even the host).
This is the only way to get back into your vault if you forget your passphrase. Nobody — not you-in-the-future without it, not the host — can undo losing both. Write it down somewhere safe right now (notes app, password manager, literally on paper).
Enter your username, login password, and your recovery code. You'll be able to set a new vault passphrase afterward.
You're unlocked via your recovery code. Pick a new everyday vault passphrase.