About PB-Runner
PB-Runner is a running coach built for iPhone and the Apple Watch, with an Android app for phone-only runners. It records your runs with the full depth your watch can capture, including the running form metrics most apps discard, and connects your training history to the AI you already use. Your AI reads your running and your recovery, then writes your next session straight to your watch, where it plays with live audio and haptic guidance.
It works with Claude’s free plan, so trying an AI running coach costs nothing. Paid Claude plans and ChatGPT (Plus and above) work too. The step-by-step setup is at pb-runner.com/guide. Running is all we do.
The app is free on the App Store (iPhone and Apple Watch) and on Google Play (Android).
Races
PB-Runner is the official race app of the BME Crosby Run, the 10K Crosby Coast Race and 5K Crosby Promenade Race at Crosby Coastal Park, Liverpool, on Saturday 22 August 2026. Entrants get the race in their pocket: course maps, travel and parking, race-morning updates pushed live, and their official result delivered in the app as a shareable finisher card. If you organise a race, see race organisers.
The company
PB-Runner is made by Bunker 47 LTD, registered in England and Wales, company number 09169480. Contact: info@pb-runner.com for general enquiries, partnerships@pb-runner.com for races and partners, and support@pb-runner.com for help with the app. We are on Instagram at @p.b_runner.