Tracking sleep quality
I'm tired and do not have it in me to research a bunch, so was hoping someone here would have done that already :)
I'm interested in tracking sleep quality, I'm starting a new regimen and I would like to get a baseline and then track intermittently, so while I'd be interested in options for things that can be ordered through a provider, I'm mostly asking about the best option I can buy and use on my own. I am adamant about sleeping at least 7hrs, going to bed and getting up around the same time, but dealing with exhaustion and while I know of several factors that cause that, I would also like to see if perhaps my sleep quality isn't ideal. And if it improves with the work I am about to start.
Cost is less relevant, I'd like whatever is A - most accurate and B - looks at as many variables as possible.
I've seen Apple Watch, Oura ring and Garmin being mentioned most frequently, but I'm not sure what the differences are between these when it comes to quality of tracking etc.
I'd PREFER a device that can do this in offline mode, as I really do sleep better with reduced RF/EMF exposure, this isn't a must though since I'm not going to use it every night. But a plus for me so worth mentioning.
Very grateful for input! Thank you!