Hello, I’ve had the Apple Watch since launch day, and updated from 0 to 3, but have never used it for tracking sleep. Someone at work recommended using ‘Pillow’ - year the watch and auto-tracks your sleep pattern and gives details on awake, REM, Light and Deep Sleep. Just wondered what other apps people use or recommend. Ps. I’m averaging about 5 hours a night sleep these days and don’t know why. It’s slowly driving me insane.