Whether you're chasing a marathon PR or your first triathlon, set your goal race and Endurance by Design builds a personalized plan that gets you there, adapting every day to your body and your schedule, so you reach the start line ready and the finish line proud.
Millions of motivated athletes train sub-optimally, plateau, get injured, or quit, and pay for tools they never master.
$150 to $300/month and limited availability put real coaching out of reach for the 95% of age-groupers who train without one.
PDF and template plans can't adapt to a missed long run, a bad night's sleep, or a sudden work trip.
Pro-grade analytics platforms assume you already think like a coach. Most athletes just want: what do I do today?
Running apps stop at the run. Triathlon means juggling swim, bike and run across disconnected tools. Few plans flex to the athlete you actually are.
Endurance by Design turns the race you're chasing into a periodized, science-backed plan, then watches your data and adapts daily so nothing knocks you off course.
From your goal race, date and weekly hours, a science-backed engine builds your full multi-sport plan on the proven 80/20 method in seconds.
Reads sleep, HRV & training load from Apple Health to score your daily readiness.
Missed a session or feeling flat? The plan realigns without losing structure.
Today's workout on phone & watch, with intervals and zones built in.
Five disciplines. One adaptive plan. One subscription.
Training for a marathon? Your plan centers on run, strength and recovery. Racing a tri? It brings in swim, bike and brick. Same engine, built around your sport.
Three steps from the goal in your head to the medal around your neck.
Pick your A-race and date, anything from a 5K to a full IRONMAN, then add your B and C races so the season is prioritized around them.
A periodized base, build, peak and taper plan, generated in seconds and laid out day by day across every discipline.
Daily readiness and automatic adaptation get you to the start line ready. Every finish then joins your trophy case, distance by distance, with the next race already on the horizon.
From open-water swims to long rides to trail miles, your plan flexes to your sport and your week.
Everything an athlete needs to train smart: generation, daily readiness, adaptation and execution.
Periodized base, build, race-specific specialty and taper plans tailored to your race, timeline and weekly hours — built in seconds, even offline.
A 5-factor algorithm of sleep, HRV, fatigue, stress and training load guides today's effort.
Every completed session broken down lap by lap and split by split, with an AI coach note on how it went.
Rest mode, lighter day, vacation mode, a comeback ramp after illness or injury, and your own training days. Tell it which days you can't train and where your long sessions go.
Missed sessions are rescheduled intelligently — and after a heavy stretch, the plan eases today's session on its own, with the reason on the card.
Live block-by-block timing with zone cues and auto-advance, on your phone and Apple Watch.
Pick your race from a curated catalogue of IRONMAN events, marathon majors and classic halves, or search live US races, then set A, B and C priorities. Race-day workouts land in the plan automatically.
Every race you finish joins your collection, from a first 5K to a full IRONMAN, alongside an adherence streak that rewards following the plan, rest days included.
It's the distribution elite endurance athletes use, while most amateurs train too hard, too often. Our engine enforces 80% easy, 20% hard automatically, so every plan is built the way the best coaches build them.
Daily readiness: 5 weighted inputs
Outputs a 0 to 100 score that sets today's status and training recommendation (push, normal, easy or rest).
Endurance connects directly to Garmin, Wahoo and Polar, and plugs into Apple Health and Apple Watch — so the gear you already own works together.
A native companion app pushes today's workouts to your wrist with live, block-by-block timing.
Reads sleep, HRV, resting HR and workouts to power your daily readiness score.
Connect your Garmin account directly — completed activities flow in automatically, lap by lap, and update your metrics.
Direct connections too — train on the watch or head unit you already own and every session syncs in, even hours after you finish.
"After a decade of racing, I'd tried every way to train: self-coaching, rigid templates, and a $200-a-month coach. The missing piece was always a plan that adapts to you and gets you to the start line ready. So I built it."
Swim, bike, run, brick and strength, plus built-in recovery. Whether you're training for a 5K, a marathon, or a full IRONMAN, one adaptive plan covers every discipline.
A PDF plan can't react when life happens. Endurance reads your sleep, HRV and training load each day, scores your readiness, and realigns the plan when you miss a session or need to back off, without throwing away your periodization.
It connects directly to Garmin, Wahoo and Polar accounts, pulls health data from Apple Health, and mirrors workouts to Apple Watch with live timing — so your completed activities flow in automatically and show up lap by lap.
No. The app does the coaching thinking for you and tells you exactly what to do today, why, and how hard. The 80/20 sports-science method is built into every plan automatically.
Endurance is free to download, and Premium starts with a 7-day free trial. Pricing is shown in the app and on the App Store before you subscribe, and you can manage or cancel your subscription anytime in your Apple ID settings.
Endurance by Design is on the App Store for iPhone, with an Apple Watch companion app. Download it here, set your goal race, and your first plan is ready in seconds.
Tell us your goal race and get a personalized plan that adapts to your life and gets you to the start line ready. Free to download on the App Store, with a 7-day free trial.
