The coach that reads the research, then reads you.
A conversational health and performance coach. Evidence-cited answers, adapted to your body and your history.
Behind the glass
Conversational coach
Natural language interaction and personalized answers.
AI intelligence
Advanced reasoning, pattern recognition, and evidence synthesis.
Science-backed
Grounded in peer-reviewed research and expert consensus.
Focus areas
Three systems. One coach.
Fitness, recovery and nutrition aren't separate problems — they feed each other. BYRN AI coaches them as one system, with the research to back every call.
Fitness
Training plans built from science-backed research and shaped around you—your goals, your injuries, your history. Your workouts adjust as you do.
Recovery
Sleep is where training compounds. Tell BYRN how you slept and how you feel, and it knows when rest beats another session. Recovery is the advantage most people skip.
Nutrition
Ask about food and BYRN answers from the research—how to fuel your training, your recovery, and everyday eating. Meal plans come in a later update; nutrition advice is there from day one.
Later, under the BYRN brand
BYRN AI is the app. This is what's next.
BYRN AI is the product launching now. These are explorations for later — separate apps under the same brand, none of them available yet, each one focused on a different aspect of your health.
Minimalist Launcher
A phone that asks less of you. Attention is recovery too.
Health App
Your sleep, training and recovery signals in one quiet place.
Calorie Tracker
Snap a photo of your food and it tracks the calories and macros—so you know you're staying on target.
One app, first
BYRN AI is the product.
BYRN AI is the app launching now — BYRN is the brand it launches under. Other tools may follow, but they come later, and they come second.
Plain answers
What BYRN AI is — and isn't.
What is BYRN AI?
BYRN AI is a conversational AI health and performance coach — a web app you install from your browser that answers your fitness, recovery, and nutrition questions with evidence-cited answers adapted to your body and your history.
Is BYRN AI available now?
BYRN AI is launching soon. You can join the waitlist today — you'll get one email confirming your spot, and one more the moment BYRN AI launches. No spam, just those two. At launch, BYRN AI installs straight from your browser to your home screen — no app store needed.
Is BYRN AI free?
No. BYRN AI is a paid subscription: NZD $20 a month, or $192 a year. There's no free tier, and that's on purpose. Every answer runs on a paid AI model and draws on live searches of peer-reviewed research, and your conversations and memory are stored encrypted, so each conversation has a real running cost. BYRN AI is built by one person, with no ads — a subscription is what keeps it running and improving. Cancel anytime; you keep access until the end of the period you've paid for. Waitlist members get 25% off their first year on either plan ($15 a month, or $144 for the year).
What's the difference between BYRN and BYRN AI?
BYRN is the brand. BYRN AI is the app — the conversational coach — and it's the first and only BYRN product launching now. Everything else shown on this site is a future exploration under the same brand.
Is BYRN a calorie tracker or a minimalist phone launcher?
No. A calorie tracker and a minimalist launcher are possible future BYRN products, still in exploration and not in development. The product launching now is BYRN AI, the conversational health and performance coach.
How does BYRN AI use scientific research?
Answers are grounded in published studies and cite them inline, so you can see where advice comes from. BYRN AI then adapts that evidence to your context — your training history, injuries, and goals — rather than handing out generic plans.
Be first. No countdown, no pressure.
We’ll reach out with early access when BYRN AI is ready. Waitlist members get 25% off their first year, monthly or yearly.
We’ll only use your email for BYRN AI — a quick note now, and one more when it’s ready. Leave the waitlist anytime from the email we send.