Sure but I would think Anubis would also somewhat stop DDOS attacks since clients need to pass Anubis to access the website and across a DDOS swarm that would use up significant resources.

Wouldn’t anubis be effective against DDOS attacks?

You can use Immich, it’s not perfect for this use case but it is searchable by content. You could just create a second account so you don’t even need to host an extra service

I don’t think people should be using it as a replacement for medical devices but it’s a convenient way to collect semi accurate health data if you just want general trends

Smartwatches are mainly used for fitness tracking at this point although I do like my Pebble and Fossil Hybrid watches quite a lot