For trail & ultra runners

Train for your
peak day.

An AI coach that reads your real runs, plans your season, routes every session from your own door — and puts the workout and the route on your watch.

Join the beta on TestFlight

You run. We handle the rest. · Free while in beta · Built for iPhone + Apple Watch

every screenshot on this site is the real app

The coach

A coach that pushes back.

Tell most apps you're injured and they'll happily reschedule your hardest session onto it. Tell Peak Days, and the coach argues for your body first — then makes the change, with a condition attached.

Grounded in your actual runs, plan and morning readiness — backed by your own numbers
Changes your plan in the chat: move, swap, ease, pause — and your calendar and watch follow instantly
Powered by Claude, contained by your data — used only to coach you, never for ads, never sold

A real coach conversation: the athlete asks to move a long run onto a hamstring niggle, the coach pushes back, then makes the change with a condition

a real conversation from the app

The morning read

Should you train today?

Every morning: one verdict, with the reasons shown. Your resting heart rate, heart-rate variability and sleep — each judged against your own normal range, never a global average. If your body disagrees with the plan, the coach offers the swap before you've laced up.

Green means go — and it says why
No black-box scores; every signal shown against your own baseline
If data is missing, it says so

The recovery detail: resting heart rate and HRV shown as band bars against the athlete's own normal range

your numbers against your normal

Routes

Trail routes from your door.

Every session comes with terrain-matched route suggestions — the distance you need, the climb the workout asks for, and as much singletrack as your area allows. Pick one and it's on your plan, your calendar and your watch.

Trail-first suggestions with honest surface percentages
Works worldwide — from your home or a trailhead you'd drive to
Import any race course as GPX and train on the real thing

The route picker suggesting two loops from the athlete's door at 73% and 76% trail

suggested from your door — 73% and 76% trail

On your wrist

Your plan and route, on your watch.

Peak Days has its own Apple Watch app. Tomorrow's session appears on your wrist by itself — the workout steps, the target zones, and the route on a trail map. A buzz at every change of step. No phone needed on the run, and no setup before it.

Today's run and route appear on the watch automatically
Step-by-step guidance with heart-rate targets, off-grid trail maps included
Finished runs flow straight back into your plan, your insights — and Strava

An Apple Watch Ultra mid-run showing the Peak Days route map with direction arrows, distance, pace, climb and heart rate

the route screen, mid-run — photographed on a real morning

After the run

After the run, the full picture.

When you finish, you get a short, plain read of the run: was it as easy as planned, why the fourth kilometre was slow, and what it adds to your season. Per-km splits, honest heart-rate zones, and a plan that counts it done — without you touching anything.

Your effort rating checked against your actual heart-rate data
Every run mapped, split and placed in your bigger picture
Planned vs done, week by week — including the honest "under" weeks

A finished trail run: heart-rate zone bar, training impact, the route on a topo map and per-km splits

the run, the map, the splits — one screen

Works with your watch

Honest about what works.

Your watch	Runs flow in	Guided workouts on the wrist	Routes
Apple Watch	✓ automatic	✓ native Peak Days app — workouts, routes & trail maps arrive by themselves	✓ automatic
Garmin	✓ via Apple Health / Health Connect	Structured-workout file export (.FIT) for power users	GPX export
Suunto	✓ via Apple Health / Health Connect	Direct watch sync in development	GPX export
Coros / Polar	✓ via Apple Health / Health Connect	—	GPX export
No watch	✓ record with the phone	Guided workouts on the phone, live route map included	✓ on the phone

The coach, the plan, the morning read and routes-from-your-door work the same whichever row you're on.

Why this exists

"I'm 40, with a family and a busy job. I had a plan in one app, routes in another, recovery in a third — and none of them talked to my watch. So I built the one place that connects it. Focus on the run, not the administration."

Read the story →

Open beta

Join the beta.

Peak Days is in open beta on TestFlight — free while we build. It's made for iPhone + Apple Watch: pair a watch and every run gets live guidance, the map and your route on your wrist. iPhone-only works too — plans, routes and phone-tracked runs.

Join on TestFlight

Open the link on your iPhone → install TestFlight → get Peak Days.