Read your real data
Every run, from your watch, automatically. Not a questionnaire you filled in once.
AI Running Coach
Rutz is an AI running coach app for iPhone. It reads every run from your watch, writes your training plan one week at a time, reviews each session in plain language, and answers your questions with your own data in front of it.
What is an AI running coach?
An AI running coach is software that does the job of a human running coach: it looks at your training, decides what you should run next, and explains why. Unlike a static training plan, it responds to what actually happened — the run you cut short, the week you were ill, the long run that went better than expected.
Good AI coaching is two jobs, and they should not be mixed up. The numbers — pace, heart rate, training load, efficiency — must be calculated exactly, in code. The interpretation — what those numbers mean for you, this week — is where AI earns its place. Rutz is built on that split: code does the math, AI interprets the results.
That matters because a language model left alone will happily invent a pace or misread a trend. In Rutz the model never does arithmetic. It is handed computed facts about your running and asked to coach from them.
Checklist
What an AI running coach should do
Plan forward from today
Next week should be written from last week — not from a calendar fixed months ago.
Explain itself
You should always know why a run is on the plan and what the last one told your coach.
Answer questions about you
"Should I race on Sunday?" deserves an answer based on your load and recent runs, not a generic article.
Keep you healthy
Hard limits on how fast your training load can rise, enforced in code, not left to a chatbot's judgement.
Know its limits
An AI coach is not a doctor or a physio. It should say so when a question needs one.
Why Rutz
Your plan. Your week.
Most apps hand you a schedule. Rutz hands you a coach that has read every one of your runs.
- 1
A plan written for you, every week
No 16-week PDF. Rutz builds backwards from your race date, then writes each week from the runs you actually did — not the ones you were supposed to do.
- 2
It flexes when life happens
Missed Tuesday? Flying Thursday? Your week reshapes around reality, so one bad day never turns into a broken plan.
- 3
Every run, explained
Finish a run and your coach tells you what it meant — effort, pacing, fatigue, and what it changes about tomorrow. Tracking isn't coaching. This is.
- 4
Works with the watch you already own
Garmin, COROS, Suunto, Polar and more. If your watch syncs to Intervals.icu, Rutz can read it. One sign-in connects everything.
FAQ: AI running coach
What is the best AI running coach app?
Look for one that reads your real run data, rewrites the plan as your training changes, explains its decisions and enforces safe load limits. Rutz is built around those four things. It is an iPhone app in private beta; you can join the waitlist at rutz.pro.
Can AI really coach running?
For structure, progression, feedback and day-to-day questions — yes, and it is available at 6 a.m. on a Sunday. It works best when exact calculations are done in code and the AI only interprets them, which is how Rutz is built. For injuries, medical issues or elite-level goals, a human professional is still the right call.
How is an AI running coach different from ChatGPT?
A general chatbot only knows what you type into it. Rutz already has your full run history from your watch, computes your training load and pacing exactly, and keeps a plan that carries on from week to week. You don't have to explain yourself every time.
Does the AI coach see my heart rate and pace data?
Yes. Rutz reads the activities your watch syncs to Intervals.icu, including pace, heart rate and elevation, and uses them to review each run and plan the next week.
Is an AI running coach safe for beginners?
Yes, provided it limits how fast your training grows. Rutz starts beginners on run-walk intervals and caps week-to-week load increases. If you have a health condition, speak to a doctor before starting any training programme.
What language does the Rutz coach speak?
Yours. Write to the coach in any language it understands — English and Hebrew included — and it answers in the same language.
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