Suggestions for wearable tracker for sleep, temperature, and heart rate?

[Agaricus (Gary Isaac Wolf)]

The body temp expert here on the forum is @ejain. Here’s a long thread from when he started his long term body temp tracking project:

Tracking body temperature

Kinsa recommends waiting 15 minutes after eating or drinking before taking oral readings. To see for myself if that’s really necessary (or, sufficient), I took my temperature a few times after drinking hot tea, and after drinking ice water. [visualization] Looks like 15 minutes is good advice, but it can take up to an hour for everything to return to normal. Since I didn’t spit out my drinks, it’s possible that the changes that persist past the 15-minute mark do in fact reflect changes to my c…