Hi! Just a heads up, most OBs really prefer that you use their doppler during check-ups kasi they know the proper technique and can spot things correctly, you know? A few of us tried home dopplers and honestly, we'd still end up going to the clinic anyway para ma-confirm ng doctor, so it felt like an extra expense. If you're looking for peace of mind between appointments, maybe ask your OB first if it's safe for your pregnancy stage?