Code does the math
Pace, heart rate, training load and efficiency are calculated exactly, in code. The AI never does arithmetic and never invents a number.
Built by a runner, for runners
Rutz is an independent AI running coach app for iPhone. It exists because most running apps track everything and coach nothing — and because no real training week ever goes the way the plan said it would.
Why Rutz exists
A watch will give you forty numbers after every run. None of them tells you what to do tomorrow. A static training plan will tell you what to do tomorrow — until you miss a session, travel for work or catch a cold, and then it simply tells you that you're behind.
Rutz sits in that gap. It reads the runs you actually did, explains what they meant, and writes the next week from there. Your race date stays fixed. Everything else is allowed to bend.
How it's built
Four rules we don't break
AI interprets the results
What those numbers mean for you this week — that is the coaching, and it is where AI earns its place.
Guardrails are not optional
Limits on how fast your training load can rise are enforced in code. No chatbot can talk its way past them.
Honest about limits
Rutz is not a doctor or a physio, and says so. If another app fits you better, we'll tell you that too.
Your data
Rutz signs you in through Intervals.icu and reads your activities with your permission. It never sees your watch account password, and you can revoke access from Intervals.icu at any time. The full detail is in the privacy policy.
Where things stand
Rutz is in private beta on iPhone and coming soon to the App Store. There is no Android app yet, and pricing hasn't been announced — there will be a free tier and a premium tier. Joining the waitlist is free, and inviting 2 friends who join earns you 1 free premium month.
Get in touch
Questions, feedback, press or partnerships: itaynaim@runcoach.net.
Your next start line starts here
Rutz is in private beta on iPhone. Join the waitlist and we'll email you when it's your turn.
Join the waitlist