Fits around a full life
Three runs a week or five. Tell Rutz what you can do and the week is built inside it.
Half Marathon Training App
Rutz is a half marathon training app for iPhone. It builds a personalized 10 to 16 week plan toward your 13.1, reviews every run you do, and reshapes the week when your schedule changes.
What is a half marathon training app?
A half marathon training app is a mobile app that plans and tracks your preparation for a 21.1 km race. It sets your weekly long run, easy runs and tempo sessions, and adjusts your paces as you get fitter.
The half marathon is the most popular race distance for a reason: big enough to be a real goal, short enough to fit around a full life. A good app respects that second part. Training has to bend around work, family and travel.
Rutz writes each week from your actual training, so the plan always fits the runner you are today — not the one a calendar assumed you'd be.
Checklist
What you get with Rutz
From 10K to 21.1
Your long run grows by a kilometre or two a week toward 18-20 km, with easier weeks built in.
Goal pace you've earned
Targets come from your own recent runs, so half marathon pace is a number you can hold — not a guess.
A coach that answers back
Ask whether to race the 10K in week six, or why Sunday felt so hard. Your coach has read every run.
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: Half marathon training app
What is the best half marathon training app?
Look for an app that personalizes from your own run data, adapts when you miss sessions, and explains your progress in plain language. Rutz does all three and is currently available by waitlist on iPhone.
How long should I train for a half marathon with an app?
10 to 16 weeks. If you can run 10K comfortably, 10 to 12 weeks is enough; newer runners should allow 16.
Can beginners use a half marathon training app?
Yes. Build to a comfortable 5K first, then give yourself 16 weeks. Rutz explains each run in plain language, which helps most when everything is new.
Will the app change my plan if I miss a long run?
Yes. Rutz rewrites the following week from what you did, and won't ask you to make up the missed distance in one go.
Which watches does it work with?
Any watch that syncs to Intervals.icu — Garmin, COROS, Suunto, Polar, Wahoo and more.
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