Here is a teapot that takes into account your heart rate, room temperature, humidity level, and other factors to brew your tea at the optimal temperature and time. The Telpo has an app with 100s of teas. You can also place your finger on the heart rate sensor to get a personalized brew.
The device is compatible with Alexa, Google Assistant, and Siri. You can use the companion app to schedule tea brewing over WiFi.