vayu-prana.com

What It Is

Vayu is a breathing training app for iOS, Android, Apple Watch, and Wear OS. Its core selling point is using a smartwatch to read real-time biosignals such as HRV, then guiding the user’s breathing through wrist-based haptic feedback. It emphasizes a “screen-free” experience, making it suitable for nervous system regulation sessions ranging from 1 minute to several minutes when stress arises, before sleep, or during work breaks.

Core Features

The product offers techniques such as 4-2-4-2, 4-4-4-4 Box Breathing, 4-7-8, CBT, Extended Exhale, as well as Pranayam practices including Bhastrika, Kapalbhati, and Anulom Vilom. The Pro version also includes Reset Sessions, Curated Sessions, Dashboard & Analytics, Journaling, and an AI Chat Assistant. The AI component is only described as providing personalized wellness guidance, with no disclosure of the model source, data usage, or safety boundaries. It should therefore be viewed as an auxiliary feature rather than a fully explained medical-grade AI.

Pricing

The free version is free forever and supports watch connectivity, basic session tracking, and access to some content. Pro costs $5/month or $59.99/year. The annual plan includes a 7-day free trial and states a 30-day money-back guarantee. Subscriptions renew automatically, and users can cancel while retaining access until the end of the current billing cycle.

Pros and Cons

Its strengths are strong hardware integration: real-time HRV feedback and wrist vibrations reduce the need to look at a screen; it supports mainstream devices such as Apple Watch, Pixel Watch, and Samsung Galaxy Watch; and it already has 55,000+ users and a 4.8-star rating. The drawbacks are that the full experience depends heavily on having a compatible smartwatch, the AI capabilities lack transparency, Chinese-language support is not mentioned, and the health data involved includes heart rate, activity, and biometric indicators, so users should carefully review the privacy policy and permission scope.

Who It’s For / Access in China

Vayu is suitable for individuals who already own a smartwatch and want to use breathing exercises to relieve stress, improve focus, or enhance sleep. It is also a good fit for people interested in HRV and quantified mindfulness. It explicitly states that it is not a medical device and cannot replace diagnosis, treatment, or emergency assistance. Access from mainland China and app store availability are not stated in the main text, so they are considered unknown.