byrn

Your coach.
Every day.
Written for you.

Byrn is an AI coach that writes each day's training session around your goals, your schedule, and your history — and gets sharper every time you log a set.

Download on the App Store Start training Join the waitlist

What it does

A real session, every day. Not a template — your coach reads what you lifted last time, how it felt, and what you're working around, then writes today's work.

Talk to it like a coach. "Only have 40 minutes." "Wrist's sore, skip curls." "Make today legs." It rebuilds the day on the spot.

Progress that compounds. Estimated 1RMs charted over time, goals with medal-gold finishes, streaks that notice when you show up.

On your phone. The iOS app is on the App Store — it logs sets with one tap, nudges you at 6pm if today's session is still waiting, and glints when you move.

Built around your numbers

e1RM

Every logged set feeds your estimated one-rep max — watch the lines climb.

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Streaks normalized to your own schedule. Rest days never break them.

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Set a goal per lift. Hit it and the whole card turns gold.

Invite-only. The app is free to download, but training needs a code — Byrn is rolling out gradually. Sign in and you'll be asked for one, or join the waitlist and your invite will land in your inbox from support@byrn.app.