Fidune is probably the most secure personal AI assistant.

It works on your iPhone. It reads your mail and calendar there, keeps what it learns there, and uses Apple's AI — on your iPhone, or on Apple's Private Cloud Compute when you turn it on. Nobody new sees your data — not even us.

It can tell you what matters this morning, who is waiting for your reply and what you promised, get you ready for your next meeting, and draft the answer — which it sends only after you approve it, word for word.

It's free, forever. If you want more, there's an optional Pro plan.