Phases sized to your date
12 weeks out or 20, Rutz fits base, build, peak and a three-week taper into the time you actually have.
Marathon Training App
Rutz is a marathon training app for iPhone. Give it your race date and it builds your base, build, peak and taper — then writes each week from the training you actually completed, so one missed week never derails 26.2.
What is a marathon training app?
A marathon training app is a mobile app that guides you through the 12 to 20 weeks of preparation for a 42.195 km race. It schedules your long runs, easy runs and quality sessions, tracks what you complete, and usually syncs with a GPS watch.
Marathon blocks are long, and almost nobody gets through one without illness, travel or a bad week. That is where a marathon training app earns its keep: a static plan leaves you behind schedule, while an adaptive app rebuilds the road to race day from where you actually are.
Rutz keeps your race date and phases fixed and rewrites the individual weeks. A load guard caps how quickly your volume can grow, so a missed week is absorbed — never crammed back in.
Checklist
What you get with Rutz
Long runs that build patiently
Your long run grows toward 30-35 km with step-back weeks, from wherever it is today.
A missed week, absorbed
Sixteen weeks never go perfectly. The next week is written from what you ran, and the load guard stops you cramming.
Every long run reviewed
Pacing, heart-rate drift and how you faded — read back to you in plain language, with what it means for race pace.
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: Marathon training app
What is the best marathon training app?
The best marathon training app is the one whose plan you will actually follow for 16 weeks. Look for personalization from your own data, adaptation when you miss training, and a sensible cap on how fast your mileage builds. Rutz is designed around exactly those three; it is currently iPhone-only and in private beta.
How many weeks does a marathon training app plan for?
Typically 12 to 20 weeks. Rutz works backwards from your race date and sizes the base, build, peak and taper phases to the time you have.
Can I use a marathon training app for my first marathon?
Yes. First-timers benefit most from a longer, 20-week build and from having every run explained. Make sure you can comfortably run 10K before you start.
What happens to my marathon plan if I get injured or ill?
See a medical professional first. When you return, Rutz rebuilds from your current fitness rather than resuming where the calendar says you should be, and limits how quickly your load ramps back up.
Does it work with my Garmin or COROS watch?
Yes. Any watch that syncs to Intervals.icu works with Rutz, including Garmin, COROS, Suunto and Polar.
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