v0.1.0-alpha

Download OpenSpiro

Free VO2max testing. No account required. All data stays on your machine.

Download for macOS
.dmg · ~8 MB · v0.1.0-alpha
Also available for
Windows
.msi · ~6 MB

System Requirements

macOS

macOS 12+ (Monterey or later), Apple Silicon or Intel

Windows

Windows 10 or later, 64-bit

Hardware

Bluetooth Low Energy adapter (built into all modern laptops). Optional: ANT+ USB dongle for ANT+ power meters and cycling dynamics.

What's included

Free

  • ✓ Live dashboard (VO2, RER, fat/carb%)
  • ✓ VO2max Ramp + RMR protocols
  • ✓ BLE + ANT+ power meter & HR
  • ✓ Session recording & replay
  • ✓ CSV + JSON export
  • ✓ Calibration & sensor preview
  • ✓ 1 athlete profile

Pro (coming soon)

  • ✓ FatMax + Efficiency protocols
  • ✓ VT1/VT2 training zones
  • ✓ AI session reports
  • ✓ PDF report export
  • ✓ Progress dashboard & trends
  • ✓ Session comparison
  • ✓ Session sharing & link export