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Hire Harlen.

An AI assistant for personal trainers.

Ask about any client

Ask in plain language, on desktop or iOS. Harlen answers from that client’s own context model: the sessions, the notes you logged, the data underneath. Nothing reaches the client until you send it.

The work between sessions.

Harlen reads every client the way you would, does the work, and comes back for your approval.

A six-week block in about five minutes. Coaches we work with put a block at roughly forty-five minutes by hand. Harlen already knows the goals, the injury history and the last cycle, so nothing is restated. It edits blocks you built yourself the same way, and every edit teaches it.

Every job in detail

Common questions.

How is this different from just using ChatGPT?

ChatGPT is a generalist that starts from nothing every time and cannot see your clients’ data. Harlen holds a model of every client, reads their wearables against their own baseline overnight, and learns how you coach: every edit you make teaches it, so each block comes back closer to how you would have written it.

Does Harlen replace the coach?

No. It brings the evidence and the reasoning, and you make the call.

Does Harlen message my clients?

Only what you approve. Drafts queue on your side, and nothing reaches a client until you send it.

All questions

See Harlen work.

Twenty minutes with one of us, no deck.