And there is no need to test all the 100 smartwatches Rob ter Horst tested on his YouTube channel

Last Updated on March 17, 2024 by pg@petergamma.org

Rob ter Horst 100 smartwatches:

But one practice is enough as Osho said and that is for instance widnessing the breath meditation:

And one device is enough to measure heart rate:

But who pays 10 000 USD for the Adinstruments recorder with Labchart software to measure his
heart rate during practicing meditation in his home lab?