Viliam comments on Open Thread Feb 29 - March 6, 2016 - Less Wrong Discussion
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No, but I've had some decent results with Sleepbot, which is much cheaper (free) if you have a smartphone already. Probably doesn't have nearly as good measurements as the mattress, and obviously doesn't make it adjustable, but it does seem to wake you up at a good time if you turn the accelerometer and microphone sensors on. (My smartphone broke, so as yet I haven't collected real empirical data on how well it works)
The application seems great, but the list of permissions it needs is scary ("perform operations like adding, and removing accounts and deleting their password", "use the authentication credentials of an account").
Ah, yeah, that could be an issue--I suppose I never noticed... I think there are similar apps which might not need so much information. You could google "sleep tracking apps". Last I checked there were at least five or six similar ones.