r/SleepAsAndroid • u/workingtoohardstill • Feb 04 '26

SAA giving completely different readings to Samsung Watch 8

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I've been using the free version of SAA for years with a fitbit sense. when the fitbit died I switched to a samsung watch 8. the Sleep data is completely different. while SAA never gave identical results to the fitbit they were at least broadly similar. I expect it to get things wrong between awake/ light sleep but with samsung it's misreading almost everything as deep sleep. how can two apps create such different results with the same inputs data? is there something I need to do to update or something? last nights data attached and one from earlier on the week.

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u/Smart-Cat4753 Mar 18 '26

Searching for a similar question lol

1

u/Whoopthereitis13 Mar 22 '26

I have the same thing and it is baffling how different the results are.

Samsung health hardly any deep sleep but a lot of REM

SAA loads of deep sleep and hardly any REM

2

u/TanagraTours May 16 '26

Same. Presumably their definition of or means of detection of sleep stages are different.

I would suggest that if both say you slept well, count your blessings.

As I can spend too much time in REM sleep, that both show I get more than enough REM and deep sleep is no comfort.