A:Answer Hi SusiQ!
Thank you for reaching out to us. We appreciate your interest in knowing if Galaxy Watch4 monitors sleep and heart rate. In line with this, yes, this Galaxy watch can monitor sleep and heart rate.
For your reference, you may access the user's manual on page 48: https://downloadcenter.samsung.com/content/UM/202109/20210929010214001/WEA_R89X_R88X_R87X_R86X_EN_UM_071621_FINAL_AC.pdf.
Should you need more assistance, please feel free to get back to us via the following options:
1. Facebook Messenger: http://m.me/samsungsupport
2. Twitter: https://twitter.com/messages/compose?recipient_id=18768513
3. Samsung Community: https://us.community.samsung.com/t5/Samsung-Community/ct-p/us
Reference #: 1144349111
Have a great day.
Melardo