Last Updated on January 26, 2023 by pg@petergamma.org
We reviewed since several years on now 1000 pages EEG, ECG and PPG devices and sports watches . With some devices, we asked ourselves, are these high-cost low-quality devices? Sometimes strange things happened. We asked ourselves if there are sellers out there who will release a new product as soon as we express a new product need in the web? But many of those which appeared quickly, it soon became clear that they did not meet our product needs.