Not exactly what you asked for but I use Simple Time Tracker for reading.

I think it has some automated function to track automatically based on some android events (Such as start or stopping a specific app) but I start/stop each reading session manually since I don’t read using the same device.

You can create different activities to track and assign tags which I do (1 tag = 1 book) and then see statistics on per activity / tag / time period.

It cannot track heartbeat or steps, it can arguably and inaccurately track sleep if you start and stop manually.

If you find any use in correlating time tracking to health (time in the gym, time doom scrolling, or what not), it may serve you some purpose.

It doesn’t know anything about calories or sleep hours or exercise, it’s a time tracking app.