Fitbit Charge 4 update brings Dynamic GPS and Smart Wake Alarms
Fitbit - Need a gentle nudge in the morning? Wake up ready to take on the day with an alarm that goes off during your optimal stage of sleep. | Facebook
How to set alarms on your Fitbit - Android Authority
How to set alarms on your Fitbit - Android Authority
4 Best Silent Alarm Clocks for a Gentle Wake up in 2022