At home fetal doppler

Hello, I was curious if any of you have used an at home fetal Doppler to hear your baby‘s heartbeat? I used one at home with my last pregnancy and I believe I found a heartbeat around nine weeks but I can’t remember for sure. I am currently eight weeks pregnant and three days with my second baby and have heard the heartbeat at the doctor when I had an ultrasound around six-ish weeks but have not been able to find it on my own with a doppler yet. I’m curious how early you were able to hear it yourself with a doppler at home?