Vayu vs HRV4TrainingThe Complete Comparison
Both apps use heart rate variability, but they do very different things. Vayu guides your breathing in real time via haptic feedback on your smartwatch. HRV4Training measures your recovery and readiness. Here's how to decide which (or both) you need.
The Core Difference
Active breathwork tool. Guides you through breathing sessions using haptic vibrations on your wrist. Reads your watch HRV after each session to confirm your practice is building coherence over time.
Passive measurement tool. Measures your HRV each morning (via camera or HR monitor) to score your recovery and suggest training load for the day.
💡 Many athletes and biohackers use both: HRV4Training to know when they're recovered, Vayu to actively improve their HRV through breathwork.
Feature Comparison
| Feature | Vayu | HRV4Training |
|---|---|---|
| Primary Purpose | Guided breathwork | HRV tracking & recovery |
| Annual Price | $59.99/yr | ~$9.99 one-time |
| Free Tier | ||
| Apple Watch App | ||
| Wear OS App | ||
| Haptic Breath Guidance | ||
| HRV-Informed Breathing Sessions | ||
| Morning HRV Readiness Score | ||
| Training Load Analysis | ||
| Camera HRV Measurement | ||
| Breathing Techniques | 10+ | Basic pacer only |
| Screen-free Use | ||
| Android Support | ||
| iPhone Support |
Frequently Asked Questions
What is the difference between Vayu and HRV4Training?
Vayu is a real-time haptic breathwork app that guides breathing on Apple Watch and Wear OS using vibrations. HRV4Training is an HRV measurement and training readiness tool that analyzes your recovery using your phone camera or heart rate monitor. They serve different purposes: Vayu trains your breathing; HRV4Training tracks your recovery.
Can Vayu replace HRV4Training?
It depends on your goal. If you want guided breathwork that reads your watch HRV after each session and adapts the next one, Vayu is the better tool. If you want daily HRV tracking for training load management and recovery readiness (like athletes use), HRV4Training is purpose-built for that. Many people use both.
Does Vayu track HRV?
Yes. Vayu reads heart rate variability (HRV) from your Apple Watch or Wear OS smartwatch after each breathing session and uses it to shape the next one, so you can see whether your practice is building coherence over time. This is different from HRV4Training's morning HRV readiness scoring.
Is HRV4Training good for breathing practice?
HRV4Training has a basic breathing pacer but it's not the core focus. It's primarily a measurement and analytics tool. For structured guided breathwork with haptic cues and HRV-informed sessions, Vayu is purpose-built for that use case.
Which is cheaper, Vayu or HRV4Training?
HRV4Training costs approximately $9.99 one-time (iOS) or has a subscription option. Vayu costs $59.99/year ($8.99/month) with a 7-day free trial and a free tier. For pure breathing practice, Vayu offers more guided features per dollar.
Start Improving Your HRV Today
Vayu's haptic-guided breathwork helps you build HRV coherence, on your wrist, one session at a time. Try free for 7 days.
