Is an AI Journal Private? 7 Questions to Ask

"Private" is one of the easiest words to put on a website and one of the hardest to pin down. Before you write your real thoughts in any journaling app, ask these seven questions. We've answered them for Glacifier too, including the answer that isn't flattering.

1. Is it end-to-end encrypted?

End-to-end encryption means only your device holds the keys, so the company running the service can't read your text. Here's the catch: an AI can't reply to words it can't read. So an app that offers cloud AI replies generally has to process your text in readable form somewhere, at least for that moment.

Glacifier: not end-to-end encrypted. Entries are encrypted in transit and at rest, and our servers read your text to write AI replies. If you need end-to-end encryption, we're not the right journal for you, and that's a fair reason to choose another one.

2. Where does my text go to get a reply?

Many apps send your text to an outside AI provider. Look for the provider's name in the privacy policy. If an app won't tell you, that's your answer.

Glacifier: your text is sent to our AI provider, OpenAI, to write replies.

3. Is my journal used to train AI models?

Ask this about the app and about any provider behind it. Also ask how long the provider keeps what it receives.

Glacifier: OpenAI doesn't use this data to train its models, per its API terms, and may keep requests for up to 30 days.

4. Can the company's staff read my entries?

Be wary of "nobody can ever see it" from any app that isn't end-to-end encrypted. The more useful question is who can, when, and whether it's recorded.

Glacifier: we don't read your journal. Access to our database is limited and logged, and it's used only for support you ask for, safety or security issues, or legal duties.

5. Is my data sold or used for ads?

Look for a plain "no", and read the part about sharing with "partners".

Glacifier: not sold, and not used for ads.

6. Can I actually leave?

You should be able to take your words with you and delete your account from inside the app, without sending an email and hoping. Ask how long deleted data lingers in backups too.

Glacifier: you can export your journal any time, and delete entries or your whole account in the app. Backups clear within 30 days.

7. What protects it on my phone?

For a lot of people, the likeliest person to read their journal is someone holding their phone. A lock on the app solves a very real problem.

Glacifier: you can lock the app with a PIN, plus fingerprint if your phone has it.

What to do with the answers

No answer here is automatically right. Some people only want on-device, fully encrypted journaling, and they accept that means no cloud AI. Others want the replies and are comfortable with clear limits. What you shouldn't accept is vagueness. An app that won't answer plainly has told you something already.

Read our full privacy policy for the details.