Every tool you need to run your best race.
Race predictor, training paces and daily readiness check-in, built around the methodology of 2× Olympian Kathy Butler.
Free · No account needed · iPhone only
Race predictor, training paces and daily readiness check-in, built around the methodology of 2× Olympian Kathy Butler.
Free · No account needed · iPhone only
Rate your sleep, fatigue, soreness, stress and motivation before you train. Over time you'll see the patterns that predict your best and worst workouts.
Log every run and watch your progress build over weeks. See your weekly mileage, pace trends and personal bests at a glance.
Enter any recent finish time and instantly see predicted finish times for every distance from 1 mile to marathon, plus all four training zones from your current fitness.
Kathy Butler
Every feature in Ready to Run reflects Kathy's real coaching methodology, the same approach she uses with her personal athletes.
Work With Kathy
When you're ready for a fully personalised plan, weekly check-ins and direct access to Kathy, 1-on-1 coaching is where real transformation happens. From first-timers to ultramarathoners.
Book a free 15-min call →Runners Say
"Kathy has transformed my running over the past three years. I ran a trail marathon, a 55K, a 50 miler, and ultimately the Leadville 100."— Ali Hummelberg, Leadville 100 finisher
"Kathy has been with me every step of the way along my triathlon career — from amateur to pro."— Sam Teller, Amateur to Pro Triathlete
Ready to Run is a free iPhone app for distance runners built around the coaching methodology of 2× Olympian Kathy Butler. It includes a VDOT-based race predictor and training paces, a run log with personal bests, and a daily readiness check-in that tracks sleep, fatigue, soreness, stress and motivation.
Yes, Ready to Run is completely free, with no subscription and no account required.
Ready to Run is currently available on iPhone (iOS 16 or later) only. An Android version is not yet available.
Ready to Run is the race-predictor and training app: race predictions, VDOT training paces, a run log, and daily readiness check-ins. Run Foundations is a separate app focused on running drills: warm-up, strength, form and cool-down videos with coaching cues. Both are free and built around Kathy Butler's coaching methodology.
Enter a recent finish time and the Race Predictor uses VDOT-based calculations to project your finish time at every distance from 1 mile to the marathon, plus your Easy, Tempo, Threshold and VO₂ Max training pace ranges, in miles or kilometres.
Each day you rate your sleep, fatigue, soreness, stress and motivation. Ready to Run charts your readiness score over 7, 30 or 90 days (or up to 12 months) so you can spot the patterns behind your best and worst workouts, and flags low-readiness days before they turn into overtraining.
Available Now
Free. No subscription, no account, no catch.
Download on the App StoreRequires iOS 16 or later · iPhone only