Telemetry shows what happened. Physiology shows why.
ApexFlow combines heart rate data with racing telemetry, letting you explore how your internal state relates to what happens on track.
Read the full launch articleWhat You'll Need
Windows PC
With Bluetooth adapter
iRacing
Real-world telemetry support coming soon
HR Sensor
Polar H10 or similar
Yudemon Account
Free to create
ApexFlow requires a heart rate sensor that supports RR interval data via Bluetooth (e.g., Polar H10).
Get Started
Install and sign in
Run the installer and sign in with your Yudemon account credentials.
Connect your heart rate sensor
Turn on your HR sensor and use the app's Bluetooth scanner to connect. The app will show your live heart rate once connected.
Record your session
Click 'Start Recording' before you begin racing. The app captures RR intervals throughout your session. Click 'Stop Recording' when you're done.
Upload your data
After your session, the app automatically detects your iRacing telemetry files. Review the files and click 'Upload' to send everything to ApexFlow.
Explore your session
Processing can take anyweher from a few seconds to several minutes. Once complete, your session appears in your dashboard with physiology data synchronized to your racing telemetry.
What You'll Discover
ApexFlow helps you see patterns you couldn't see before. It's a tool for exploration and self-discovery, not a coaching system (yet).
Track your physiology by position
See how your HRV and heart rate change around the circuit, lap after lap.
Compare sessions and events
Practice, qualifying, race – see how your state differs across session types.
Identify stress zones
Automatic detection of where HRV drops and how quickly you recover.
Explore cross-session patterns
Track trends over time, by track, by car, and more.
Example: Heart rate and HRV state mapped to track position, letting you see exactly where stress builds.
Questions? Feedback? Reach out at max@yudemon.com