Home Assistant is a home automation platform running on Python 3. It is able to track and control all devices at home and offer a platform for automating control.
Python 3.5 support is deprecated in the first release oh Home Assitant after August 1 (0.97). Yunohost provide python 3.5 (based on debian stretch). According to that, the latest compatible version with yunohost is 0.96.5. As soon as yunohost is compatible with debian buster, scripts will be updated to provide the latest version of Home Assistant.