A mental workout,
disguised as a good conversation.

Show up for a few minutes a day. Debate, reason, remember, and play — with someone who talks to you like a peer. The exercise is real; it just never feels like one.

Something else

⚡ Wordplay

Fast, fun language games in the flow of chat.

Start →📖 Stories & memory

Draw out a story worth telling.

Start →💬 Discussion

A real conversation about what's on their mind.

Start →⚔️ Debate

Pick a side. I'll take the other.

Start →⚖️ Case reasoning

Work through a thorny hypothetical together.

Start →

How should I talk to you?

A warm, curious companion. Set this once — it applies to every conversation.

🎙 Daily check-in · ~2 min

A short, standardized spoken task (describe a scene, then name animals). This is the research-grade measurement — the most comparable signal over time.

Start today's check-in →

View progress →Caregiver view →The science behind it →Your data & privacy →

A prototype. Not a medical device and not a substitute for clinical care. The language signals it tracks are a personal trend, not a diagnosis.