Your running data. Your AI. Your coach.
Connect your running history to your favourite AI and create a coaching assistant that knows you, your ability and how you actually train.
Bring the AI you already pay for · Your data, downloadable · Built for Apple Watch
Keep the apps you love.
One tap shares a finished run to Strava, and your friends, kudos and segments stay exactly where they are. The share is write-only: PB-Runner never reads from your other apps, and never asks you to leave them.
Describe the workout. Run it minutes later.
Ask your AI for interval sessions, pyramids, progressions: any format, in plain language. It writes the session to the app's schedule and plays it through your run with live cues, on Apple Watch or iPhone. The watch runs it standalone, so the phone can stay at home.
Ask
Tell your AI what you want: a pyramid, a progression, 6 × 800 at 5K pace. Plain language, no builder screens.
Confirm
It drafts the week into your schedule and shows you exactly what it wants to write. Nothing lands until you say yes.
Run
The session builds itself on your phone and watch: target pace per rep, rep counts, recoveries.
Hear it
Haptic taps, beeps or a spoken voice walk you through every segment, and nudge you when you drift off target pace.
Analyse the result with your AI: every rep, every recovery; then use what you discover to calibrate the next one.
Most AI coaches only know what you tell them. Yours knows your training history from the start.
PB-Runner turns years of runs, workouts, recovery data and progress into something an AI can actually understand. Your AI learns who you are as a runner, then writes sessions back into your schedule and onto your wrist.
Everything your AI needs to coach you
- Your whole history: runs from any app that records to Apple Health, synced in
- Every run: splits, best efforts, trends
- Form dynamics and per-rep interval detail
- Sleep, resting heart rate, HRV, VO₂max
- Training load, readiness, goal progress
Bring the AI you already trust.
The subscription you already pay for, no second coach to buy. Connect once and your AI can read your training history, answer questions about your running and build workouts directly into your schedule.
Every write is proposed first. You confirm before anything lands.
Be coached as the unique runner you are… not as your age group.
Every coaching decision rests on a living profile of you as an athlete: your real ceilings, your real paces, your goal, your history. It’s the context sheet that makes the coaching yours, not a generic plan for a runner your age.
Import, or start fresh
Bring your running history in from Apple Health and the profile builds itself from years of real runs: personal bests, observed heart-rate ceiling, working paces. Or start from zero and it grows with your first one.
Your AI fills in the rest
The first time you connect your AI, it's prompted to finish the profile with you: what you're training for, your target race, the things the data can't know. A short conversation, not a form.
It never freezes
Max heart rate comes from observed peaks, not 220 minus your age. Paces recalibrate as you get faster. Every change is logged, so your coaching carries an arc, not a snapshot.
I’ve read your history: 312 runs. Tell me what you’re training for and I’ll set up the rest of your profile.
- Observed: rises with real peaksMax heart rate188 bpm
- This morningResting heart rate47 bpm
- Recalibrated weeklyTraining pacesE 5:25 · T 4:35 · I 4:10
- From your imported history5K personal best20:31
- You told your AIGoalSub-42 10K · Oct 18
Working tempo 4:40 → 4:35 /km · “held it across all six reps”
Training plans don’t wake up with you.
This coach does.
The coach that actually adapts to how recovered you are this morning, and that you can talk to. Resting heart rate, sleep, HRV and VO₂max, fused with your training load into Fitness, Fatigue and Form. When this morning’s numbers say back off, your coach already knows.
“Can I record my kayaking session?”
No. Running is all we do.
We track the data others don't. Your watch already measures how you run, not just how far: we keep every sample, and your AI coaches off it.
Effort that stays honest uphill, downhill and into the wind.
How long each foot spends on the ground: form, measured.
Bounce: the energy that isn't moving you forward.
Per step, from the watch's own motion pipeline.
Steps per minute, and whether they hold late in the run.
Heart-rate recovery at 30, 60 and 90 seconds after every rep.
What the hill actually cost you, from real terrain data.
Did your pace hold its heart-rate cost, or drift?
Built from your observed max, not an age formula.
Set the goal. Watch as you close the gap.
Tell your AI what you're chasing. Your predicted time, built from real and recent efforts, descends toward the goal line week by week. Points for showing up, hitting distance, holding pace.
Sub-42 10K · race day in 9 weeks
Predictions come from your trailing 90 days of real efforts, with their confidence and provenance always shown: never a number pulled from the air.
Built for runners.
Your data is yours.
Every run is kept at full resolution, never averaged down behind your back. Read it, point any AI at it, or export everything: every run, every metric, every workout. Bring-your-own-AI only works if the data is genuinely yours.
“For the long run we planned that was hotter than ideal; for the next easy long run, let’s dial back toward ~5:40–5:50/km to keep you in Z2.”