The funny thing is: This is very likely just a VOC detector with a fancy API. I can’t imagine that they spent too much on actual hardware development, especially as they are afaik not a real hardware company.
So it will be triggered by VOC.
You know what else does cause a lot of VOC to be distributed in a environment?
Yeah. Taking a proper shit.
This has very likely never been tested on an actual toilet.
Cloudron is also an option. More polished than Yunohost, created by a German company. Very low rate of admin interaction required. But not for free if you need more than two Apps.