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Race Day

Race setup screen

Setup

Free · LA Marathon 2026

Your AI
Running Coach

Real-time coaching through your AirPods. Live pacing, heart rate zones, split analysis, and hydration reminders — all powered by AI, all on race day.

iPhone + Apple Watch · Works with any music app

Join the Beta

Free. No account required.

What it does

Live AI Coaching

Claude or ChatGPT coaches you in real time through your AirPods. Adapts to your pace, heart rate, and how the race is going.

Heart Rate Zones

Streams live heart rate from Apple Watch. Tracks your zones, warns you before you redline, adjusts coaching to keep you safe.

Mile Splits

GPS-tracked pace and distance. Per-mile splits with heart rate. Tells you when you're ahead, behind, or fading.

Talk to Your Coach

Ask questions mid-race with your voice. "Should I speed up?" "How's my heart rate?" On-device speech recognition.

Music Aware

Works alongside Spotify, Apple Music, or whatever you run with. Audio ducks your music when the coach speaks.

Voice Options

Choose your coach's voice. Four options powered by ElevenLabs — or use the free built-in voice.

How it works

01

Add Your API Key

Bring your own Anthropic or OpenAI key. Takes 2 minutes. Or skip AI and use PaceKit as a standalone race tracker.

02

Set Your Race

Pick half or full marathon. Set your target pace, max heart rate, and how intense you want the coaching.

03

Start Running

Hit start and go. Your coach talks to you through your AirPods. Live Activity shows your stats on your lock screen.

Your data

Privacy First

PaceKit has no servers, no accounts, no tracking. Your data stays on your device. AI coaching uses your own API keys — we never see them.

On Your Device

GPS location, HealthKit data, race history, and API keys never leave your phone. Stored in encrypted Keychain or kept in memory only.

Sent to Your AI Provider

Race metrics (pace, HR, distance) and voice transcripts are sent to Anthropic or OpenAI using your API key. No personal identifiers included.

No Tracking

Zero analytics. No Firebase, no Mixpanel, no crash reporting, no telemetry. We don't know who you are.

No Account

No sign-up, no email, no login. Download it and use it. Nothing ties your usage back to you.

Race day is
March 8.

Join the beta now. Get PaceKit dialed in before the starting line.

Download on TestFlight

iOS 17+ · iPhone + Apple Watch required for HR