I HATE HATE SAAS/HAAS products as a consumer....now as a Finance Exec it is the sexiest shit on the planet for driving valuations...and for good reason. Your customers are locked in like a mf'er.
I have a Galaxy watch, 4 I think, and I track my sleep results in a spreadsheet along with the various sleep supplements I take, last meal etc. I am a bit OCD.
The site below is very interesting on how accurate/inaccurate these devices are. Highly recommend you watch a review of your target product prior to buying it...
On the sleep monitoring, I used a few things including Galaxy watch and the best sleep apps on phones etc (recorded sounds and all). I'd get medium to good marks on sleep...
Turned out I had severe sleep apnea. 50+ events per hour with blood oxygen crashing into and nearly through the 80s at some points. This is when even the doctor says "whoa fuck".
Been on a machine since and I consistently get 0.5 to 2 events per hour average (5 or under so no sleep apnea).
Point being, I have previous little faith in accurate sleep monitoring of the all in wonder devices. Love my whoop but even it, I take with a large grain of salt.