The adaptive running coach
A coach that
learns how
you run.
momentum builds your training around your fitness, your recovery, and your life — then adapts it after every run. From your first 5K to your first ultra.
Track free forever · Pro comes with a 7-day free trial
GPS distance accuracy
lost workouts — every fix saved as it lands
heart-rate zones, personalized to you
live map, even on long runs
Why momentum
Training science first. AI where it helps.
Your paces, loads, and progressions come from a deterministic training engine — testable, bounded, honest. The AI explains the plan; it never invents your numbers.
A plan, not a template
Built from your real history — momentum reads your recent runs from Apple Health and starts where you actually are, not where a quiz guesses you are.
Coached while you run
Guided intervals with live pace bands, 3-2-1 haptic countdowns, and a voice coach that tells you when to push and when to ease off.
Protective by design
Recovery signals, workload guardrails, and an injury-aware loop that trains around a twinge instead of pretending it isn't there.
The whole journey
Plan it. Run it. Understand it.
A periodized plan
Base, build, and taper — every week labeled with why it exists, capped by workload guardrails.
Coached mid-run
Step-by-step guidance with target paces, rep countdowns, and your live heart-rate zone.
A coach you can ask
Pace, programming, or how a session felt — answers grounded in your actual training data.
Every run becomes art
Your profile is a wall of routes and muscle maps — a private mirror of the work you've put in.
Pace intelligence
A coach that reviews your run — not just records it.
After every guided session, momentum compares what was prescribed with what you ran, rep by rep, and gives you a verdict in plain language.
- On point, Ahead, Review, or Variable — judged against your prescribed pace bands
- Strong runs sharpen your future paces automatically
- Easing your targets always asks first — your plan never lurches
Your body, measured
Heart rate, zones, and recovery — from the gear you already own.
Apple Watch, Garmin, or a chest strap: live BPM and your current zone on the run screen, time-in-zones afterwards, and readiness signals that shape tomorrow's session.
- Zones personalized from your max and resting heart rate
- HRV, resting HR, and sleep flow in through Apple Health
- Every reading saved the moment it arrives
Your map
Every street you've ever run, burned into your map.
A personal heatmap that traces your actual routes — the streets you repeat glow hotter. Suggested loops start and finish at your door, sized to today's session.
- Route suggestions drawn on the map before you commit
- Six base maps, satellite included — your choice everywhere
- Private by default. Your map is yours.
Try the engine
What could you run?
Enter a recent result and the same deterministic model that calibrates momentum's training paces projects your other distances.
10K
Half
Marathon
Riegel endurance model — the same math the app's race predictor runs. Flat-course, even-pacing estimate; momentum builds the plan that gets you there.
Every starting line
A plan for the runner you are today.
Pick the goal; momentum builds the road — and tells you honestly if the date is too tight.
Your first — or your fastest.
Speed meets staying power.
The distance that hooks you.
Twenty-six point two, built week by week.
Brand new? Start exactly where you are.
Coming back from injury, gated and gradual.
No race — just sharper paces.
Build the engine. Ultra is coming.
The method
No red days. No guilt loops. Only momentum.
Missed sessions move.
Life happens. A missed run reschedules itself with a one-line rationale — there is no “failed” state anywhere in the app.
Streaks forgive.
Rest days count and one slipped day is forgiven. A streak should measure consistency, not perfection.
Numbers you can trust.
Every pace and load is computed by rules we can test — bounded, explainable, and never invented by a language model.
From the beta
Runners are keeping their momentum.
“It moved my long run when work blew up my Tuesday — no guilt, no red X. I've stuck with this plan longer than anything I've tried.”
“The pace review after intervals feels like a coach actually watched the workout. It told me my reps ran hot and asked before changing anything.”
“I wore my strap and it just showed up — live zones on the run, the full chart after. No pairing circus, no exports.”
Pricing
A coach for less than a race entry.
Personal run coaching costs $150+ a month. momentum's adaptive engine trains you for a fraction of one session.
Free
forever
- Track every run — GPS, pace, splits, elevation
- Live heart rate & zones from your gear
- Strength logging with the full exercise library
- Your first adaptive training week
- Recent history & personal heatmap
momentum Pro
7 days free, then $119.99/year (about $10/month) · or $19.99/month, cancel anytime
- The full adaptive plan, recalibrated after every run
- AI coach, post-run reads & voice guidance
- Recovery-aware training & the injury loop
- Advanced analytics, race predictions & full history
- Every share style & watch premium
Questions
Everything runners ask us.
Is momentum free?
Tracking every run is free, forever. momentum Pro — the full adaptive plan, AI coach, voice guidance, and advanced analytics — is $119.99/year with a 7-day free trial, or $19.99/month.
Do I need an Apple Watch or heart-rate strap?
No. Your iPhone handles GPS, pace, and guided workouts on its own. If you wear an Apple Watch, a Garmin, or a Bluetooth chest strap, momentum picks up live heart rate and zones automatically — no pairing flow, no exports.
I've never run before. Is this for me?
Especially for you. momentum starts from your actual starting point — run/walk intervals if that's where you are — and its honesty engine will tell you if a goal is too aggressive rather than setting you up to fail.
How is momentum different from other running apps?
The plan adapts after every run, protectively. Recovery signals, workload guardrails, and an injury-aware loop reshape your week within tested bounds — and the coach explains every change in plain language. AI narrates; it never invents your numbers.
What happens to my data?
Your runs live on your device first — every GPS point is saved as it happens, so nothing is ever lost. Health data stays in Apple Health under your control. Your map and history are private by default, and we never sell personal data. See our Privacy Policy for the full picture.
What if I miss a workout?
It moves. momentum reschedules it with a one-line explanation, and your streak survives — rest days count and one slipped day is forgiven. There is no red 'failed' state anywhere in the product.
keep moving.
Seven days of the full coach, free. Bring a goal — momentum will bring the plan.
Download on the App Store