
Dhyana yoga meditation tracker is a smart ring that tracks your Heart Rate Variability, to measure your meditation.
A smart ring with an APP and it works with all the popular apps YouTube, Headspace, Calm, etc.
It has wireless charging option also.

Is it necessary to have a device for meditation. Then answer is “YES”
The device helps to guide you; analyze how well you’ve done and motivate you to keep going and it estimates exactly what meditation needs right now
Dhyana yoga meditation ring promise is to measure your mindfulness which is an act of being focussed/aware without getting distracted.

The device perfectly works with the dhyana app, available on the App Store and Play Store.