I have an anterior placenta and so it was a long time before I could feel my baby moving regularly, which led to a lot of stress and runs to the doctor or ER. After one of these trips, per my OB’s recommendation, I rented one from Heartones.com. It’s the exact same one he uses in his office, with the readout, but you can rent one without the readout. They also throw in a bottle of the lotion, and if you decide to buy one they’ll deduct the rental fee from your total. Also if you return it early they’ll prorate your refund, and if you go over they’ll just charge you month by month. I rented mine for an extra month after my due date so I’m not scrambling to return it. Clearly I’m very happy with it! I think a medical-grade one is the way to go.