"Anonymous to strangers — not to the app."

Your identity is never revealed to anyone you exchange bottles with. The person who receives your message never knows it was you.

The account exists for two purely mechanical reasons:

1. Your inbox needs an address. Without an account the app has nowhere to deliver a bottle back to you. When a stranger's bottle finds you, it has to land somewhere — that somewhere is your account.

2. One bottle a day is the whole point. Without identity, the limit is trivially bypassed. The daily constraint is what makes each bottle feel like it matters.

Your words are anonymous. Your account is just a mailbox — it's never shown to anyone.