I've been using Pulsoid since October 2020 as a variety horror creator on Twitch at the time. The Android App works seamlessly with my Polar H10 heart rate monitor (chest strap) and responsively shows my heart rate on stream with a simple browser source. It's very configurable and my community has expressed that they like seeing my heart rate especially during horror games many times. I've also seen several close friends adopt it and enjoy it in their own streams as well. Would definitely recommend!