Changes

==Open Source==

==Open Source==

Cheapest category. Requires some DIY even if that is just understanding how to use an accompanying analysis program. Sometimes much more. Always exports data. Company cannot disappear and suddenly make the product not function at all.<ref>https://www.pcmag.com/news/smart-home-company-insteon-shuts-down-servers-without-warning</ref><ref>https://en.wikipedia.org/wiki/Microsoft_Band_2</ref>  Never hides the fact that, the device is recording bad signals, from user. Privacy depends on you as you are the only one with access to your data. Nightscout was originally an open source project from which was made an FDA approved medical device.<ref>https://en.wikipedia.org/wiki/Nightscout</ref>

Requires some DIY even if that is just understanding how to use an accompanying analysis program. Often much more. Cheapest category partly because commercial products often require a monthly fee.<ref>https://support.ouraring.com/hc/en-us/articles/4409086524819-Oura-Membership-FAQs</ref><ref>https://www.whoop.com/membership/pricing/</ref>  Always exports data. Company cannot disappear and suddenly make the product not function at all.<ref>https://www.pcmag.com/news/smart-home-company-insteon-shuts-down-servers-without-warning</ref><ref>https://en.wikipedia.org/wiki/Microsoft_Band_2</ref>  Never hides the fact that, the device is recording bad signals, from user. Privacy depends on you as you are the only one with access to your data. Nightscout was originally an open source project from which was made an FDA approved medical device.<ref>https://en.wikipedia.org/wiki/Nightscout</ref>

== References ==  

== References ==