What are /r/Bio_Hacking's favorite Products & Services?

From 3.5 billion Reddit comments

You don't need blue blocking glasses; just directly block the blue light from the electronic device itself: https://justgetflux.com/

For nightlights, use red LEDs. Red light doesn't disturb the circadian rhythm.

What's an HRV?

Also what kind of phone do you have? There are a few apps that may fit what you are looking for, meaning you don't have to spend hundreds of dollars for specialty-made equipment.

https://itunes.apple.com/gb/app/sleeptracker-24-7-standalone-sleep-tracker-alarm/id505074676?mt=8

https://play.google.com/store/apps/details?id=com.lslk.sleepbot