It shows its reasoning, not its confidence
Ask where to stay and Memento names one place and attaches the reason: 'you said you'd rather walk than take taxis, and it's 6 minutes from your Day 2.' A taste of yours, joined to a fact it verified. The other options it checked are folded away behind a line telling you how many there were — so a recommendation is a decision you can audit, not an adjective.
You can read everything it remembers
What Memento knows about you is a real record you can open in Settings: a travel profile it derived, notes you can edit, and the whole file list. Nothing about you is kept somewhere you can't see, and you can change or delete any of it.
You can watch it think
While Memento works, the three writing dots become a button. Tap it and its actual reasoning unrolls live — interleaved with the steps it took, in the order it took them — then settles into a single margin note when it's done. Its answers stay short because the thinking happens somewhere you can look rather than in the middle of the reply.
It has already noticed something when you open it
Come back after a few days and Memento opens with a real question about your actual life — not a greeting. It spots what's missing on its own: days drawn with nowhere to sleep, a trip closing in on an untouched prep list, a show in your city that closes soon.