Will my journal be used to train an AI?

It's a fair question now, and reading terms of service updates from journaling and notes apps over the past few years will not reassure you. "To provide and improve AI features" is doing a lot of quiet work in a lot of privacy policies. Even companies acting in good faith face a plain incentive: a large corpus of intimate, well-written, dated human experience is exactly what language models are hungry for.

You don't have to speculate about anyone's intentions if the data never leaves your hands. The Sealed Journal has no AI features, no analytics on your writing, and — the part that actually settles the question — no copy of your entries anywhere but your own device, encrypted with your passphrase. Your journal cannot train a model for the same reason it cannot leak, be sold, or be summarised into an "insight": it is not in anyone's possession but yours.

We think a journal should be one of the few remaining rooms where you are not producing data for anything. What you write here feeds nothing. It just stays written.