I would disagree with that. As I work in the software industry I work daily dealing with insecure software, threat mitigation, etc and I have a slightly different perspective.
As you can imagine our security team would not be very happy if I installed this application on a company phone. Quite frankly it's probably not even possible to do so.
As I use my personal phone for banking to trading stocks to paying taxes as such it has in many ways replaced traditional computers. I think in my mind if my multibillion dollar company employing some of the brightest minds in the industry likely wouldn't want this on the companies phones, why would I risk my financial safety to do so? Is it worth it to control some lights?
While I'm sure you've done your own risk assessment. My initial risk assessment is that I would not trust it on a shared device. I did this based on a scan via
VirusTotal. While not flagged (likely due to low application useage) there are some values in the Mitre ATT&CK Tactics and Techniques that in my mind throw some caution flags, "Hey you, don't use your main personal phone for this."
This application probably isn't the next generation of DroidKungFu, but hey what do I know?
Maybe you can cure me of my ignorance and explain to me why you think it is secure?