How your diary BFF writes back

Short answer: Your diary BFF stays quiet while you write. Tap Ask and it writes back right under your words, in a few sentences. You can turn replies off in Settings and the diary keeps working the same.

Only when you ask

Nothing happens until you tap Ask. Then your diary BFF answers what you wrote — once, and short — with at most one question. It doesn’t hand you a list of advice.

It remembers, with the date

Something you wrote last month? Ask about it and your diary BFF brings it back, and shows you the day you wrote it. Settings → What your diary BFF remembers lists what it keeps, and you can delete any line.

What gets sent, and where

Before the first reply, the app shows you what gets sent: that entry, plus short notes from earlier nights (with their dates). Not your name. It goes to Anthropic, the company whose model writes back; if Anthropic is down, it goes to the same model on Amazon Bedrock instead. Neither trains on it.

Say no and the diary still works the same. It writes, it saves, it locks. Your diary BFF just stays quiet.

Turning replies off

In Settings, turn off the writes back switch next to your diary BFF’s name. Nothing more is sent.

A name, and he/she

When you start, the app asks what you want to call your diary BFF and lets you choose he/she. Replies and the app use the name you pick.

It’s not a person

The replies aren’t written by a person. Your diary BFF is an AI that lives in your diary.

A reply felt off? Write to hello@diarybff.app and tell us the date. You don’t need to paste what you wrote. · All help · Diary BFF on the App Store