alt Hacker NewsIt looks almost entirely like gemini. The images they showed are obviously nano banana, and the text responses are almost obviously Gemini (I say as a somewhat frequent Gemini user).
I'm sure they customized some of it, but this looks basically like Gemini integrated with iCloud instead of Google Workspace.
I'm curious what the obvious tells were for you. I never use any of these tools so I do wonder what sets them apart for those in frequent contact.