Why Choose REN?
REN isn't just another running app. It's a complete training system built by elite coaches and designed to adapt to your unique needs.
Built by Experts — Your Coaches
World-class athletes and coaches who've competed at the highest level, now bringing elite training to everyone
Michel Butter
Elite Marathoner • PB 2:09:58
One of the greatest Dutch marathoners, Michel ran a personal best of 2:09:58 and placed top 8 in Boston and NYC. A 14-time national champion, he is currently preparing athletes for the 2026 Olympics as a performance coach while bringing his elite experience to REN.
"I've trained for the biggest stages. Now I want every runner to experience training that actually adapts to them."
Guido Hartensveld
Elite Coach • 500+ National Medals
Elite coach and founder of Team Distance Runners, Guido has guided athletes to over 500 national medals and countless international championships. As Michel Butter's longtime coach, his deep expertise shapes REN's smart, adaptive training approach.
"We designed every plan inside this app to balance real life and real progress — grounded in elite methods, made for everyday runners."
Jim van den Berg
Human Movement Scientist • PB 2:59:52
Founder of JOIN Cycling and human performance scientist specializing in endurance training. Jim coaches professional cyclists while maintaining his passion as an accomplished recreational runner with a sub-3-hour marathon. His scientific approach to training optimization is integral to REN's adaptive methodology.
"The science is clear: training must adapt to the individual. REN brings that precision to every runner, every day."
How REN Compares
See why REN's adaptive approach outperforms traditional running apps
| Features | REN | Other apps |
|---|---|---|
Training plan adapts every dayAI Powered |  | Limited |
Elite Coach ExpertiseFrom real coaches | | Limited |
| Separate thresholds: AeT, CS, VO₂max | | — |
| Accurate Race Predictions | | Basic |
| Wearable Integration | | Limited |
Why REN Is Different
Built with elite insight. Personalized for your life.
Other apps give you generic plans. We deliver:
- Real-time plan updates based on your progress
- Race-ready workouts designed by elite pros
- Automatic syncing with your Garmin and Apple Watch
- Training that adapts to your busy schedule
No fluff. Just what works.
Busy lives and flexibility
Life doesn't follow a perfect schedule, and neither should your training. REN adapts to your changing needs, helping you maintain consistency without stress.
When life happens—whether it's an unexpected meeting or needing an extra rest day—REN adjusts your plan based on your activity, recovery metrics, and available time.
The result? Better consistency, fewer missed workouts, and training that fits your life instead of the other way around.
Ready to transform your running?
Join thousands of runners who are training smarter with REN.