openHAB might be a bit more popular than HB Ring. We know about 1 link to it since March 2021 and only 1 link to HB Ring. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
The price is insane, but https://thetouchx.com/ exists. Source: almost 3 years ago
You can start on a general home automation like openhab.org. Source: almost 2 years ago
Motiv Ring - A fitness tracker you can truly keep on
Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Tep - Fitness tracker meets tamagotchi. Don't starve it!
ioBroker - flexible and modular application for the IoT and Smarthome
Nimb - Smart ring with a panic button
Google Home - Set up, manage, and control your Chromecast, Chromecast Audio and Google Home devices.