My reply re “consumer” was only meant to be in relation to the OP,
I’m using SleepWatch and find that the information is not that accurate. Does anybody have a sleep application that they feel you don’t have to fuss with but just tracks your sleep based on the fact you’re not using your iPhone and your heart rate falls.
rather than EEG, I was responding re actigraphy and ECG (e.g., with Apple Watch or its competitors), i.e., that they cannot validly reflect sleep with anywhere nearly as well as EEG (and other tech like fMRI) (and as I will note below: as humans).
At the conference, I met some great folks connected to Dreem. Without being specific (as noted below) I would say generally that EEG tech like Dreem’s with automatic scoring of EEG is quite promising for certain purposes, though it is still early days for other purposes.
EEG, although widely used and super important scientifically, does have limitations. As I mentioned, researchers working on this have strongly argued that none of the technical psychobiometrics predict sleep quality well. cf. Jamie Zeitzer’s “When a gold standard isn’t so golden:Predicting subjective sleep quality from sleep polysomnography” in https://worldsleepcongress.com/wp-content/uploads/2019/06/WSS-2019-PRELIMINARY-PROGRAM-low-res-6-10-19.pdf .
There is also a huge issue around sleep state “misperception”. Sleep researchers , based on PSG, used to claim (and some still do) that insomnia typically involves misperception of one’s sleep. Counter evidence arose from fMRI, and more importantly an analytical (a priori) argument, from Daniel Kay (a colleague) and Daniel Buysse. Technical EEG data, even if processed through machine learning and an app, may be biased by the “old school” view of sleep state misperception. And manufacturers of this device (whether they succumb to them or not, and I have not a clue whether they do) have market pressures to convince consumers or imply that their device speaks the truth, and a complete one, about sleep. There’s a valiant attempt to provide the consumer with meaningful information. But involving a sleep expert to interpret the data may be quite helpful for some consumers (though admittedly that is not practical or affordable for many, hence sleep tech). These claims of mine are just generalities.
I wouldn’t want to express a particular opinion about any particular hardware here. I will likely take up related themes on the mySleepButton.com/blog, which deals specifically with sleep issues.
(The above is not any form of advice, medical or other).