Ask HN: Best sleep trackers?

I use a couple of apps in order to track my sleep. I have sleep apnea, so I like to check how much noise I am making in a night. I use SnoreLab for that.

When I don't want to track snoring solely, I use Sleep Cycle, which tracks the agitation of your sleep, and uses that to wake you up. The tracking info is quite good as you can see the amount of rem sleep and where in the night that happened. It is also good to perceive trends through time in terms of sleep quality.

I track my sleep with my Apple Watch (with an app obviously). I used Pillow (app) for a while, but recently I switched to AutoSleep (and I'm happy with the change). The app write up states that it tracks movement, but it doesn't really deliver direct data about movement. I think it does track sleep very well, and had allowed me to greatly improve my sleep health.

Girlfriend and I use Apple Watch with AutoSleep (http://autosleep.tantsissa.com/).

Not having to set anything up or say I'm going to sleep is perfect for us, and the results seem to generally be in line with reality. I don't believe it tracks restless legs. It's really comfortable with the sport loop band.

From the limited research I did a few months ago it seemed as if the additional accuracy derived from a dedicated device was outweighed by the faff of setting it up + the additional utility of a multifunctional Apple Watch / Fitbit-type device. It felt like a single-digit % gain in accuracy over Apple Watch, which had a huge % gain in utility.

Have you tried iron supplements? The evidence I have on it is purely anecdotal, but it really helped my son with his restless leg.

Leg movement is probably hard to track. I would think that the Withings Sleep Tracking Mat might be working somewhat, but I have no first-hand experience.