Cheapest HR+sleep tracker

Hello, QS’s
our startup is looking for a quite reliable and cheap HR+sleep tracker producer for the device integration&marketing with our innovative product (ie white-labeling) - looking for suggestions of already known brandnames or starting newbies. On our top list is xiaomi - any alternatives to it?
many thanks in advance,



I am also interested in this. Sleep quality reflects the health of the autonomic nervous system and a depreciated ANS is a component of many disease states. We are focusing on chronic pain. What re you using it for?

@ramujana - That’s what I’d like to log cheaply as well.