Oura Ring Gen 3
Yes (light, deep, REM)
sleep stage tracking
Yes
smart alarm
4-7 days
battery life
Ring (titanium)
form factor
4.7/5
app rating (ios)
$299-$549 + $5.99/mo membership
price
Withings Sleep Analyzer
Yes (light, deep, REM)
sleep stage tracking
No (via IFTTT)
smart alarm
N/A (mains powered, under-mattress pad)
battery life
Under-mattress pad
form factor
4.5/5
app rating (ios)
$129.95 (no subscription)
price
Whoop 4.0
Yes (light, deep, REM, awake)
sleep stage tracking
Yes (haptic)
smart alarm
4-5 days
battery life
Wrist strap (no screen)
form factor
4.6/5
app rating (ios)
$239/year or $30/month (membership required, device included)
price
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