Platforms
IOS, ANDROID, WEB
Free Tier
Yes
Paid Price
$90/year for Pro
Sensors
5 supported
The Verdict
The most scientifically rigorous HRV app available. Kubios is used in academic research and provides metrics you won't find elsewhere. Best for users who want deep analysis and are willing to learn the science behind HRV.
Features
- Research-grade HRV analysis
- Time and frequency domain metrics
- Readiness and stress scores
- ANS Balance analysis
- Cloud sync and reports
- Raw data export for researchers
Pros
- Scientific gold standard
- Most comprehensive metrics
- Works with many sensors
- Used in peer-reviewed research
Cons
- Steeper learning curve
- Interface less polished
- Pro features expensive
- May be overkill for casual users
Scientific Pedigree
Kubios started as academic software used in thousands of peer-reviewed studies. The consumer app brings that research-grade analysis to your phone. If a metric exists in HRV science, Kubios probably calculates it.
Understanding the Metrics
Beyond basic RMSSD, Kubios provides PNS Index, SNS Index, Stress Index, and full frequency domain analysis (VLF, LF, HF power). The Readiness score simplifies this into actionable guidance for non-researchers.
Compatible Sensors
- Polar H10
- Polar Verity
- Garmin Hrm
- Oura Ring
- Apple Watch