I want to share my experience with Rigger App:
Rigger is an app for android, I’ve been using it until it stopped working with Hiveos2 in August2018.
I could monitor every rig and every gpu: hashrate, power consumed, temperature and fan speed.
Very practical thanks to its widget (attached image).
I have not found information about this app neither in hiveos forum nor in google, but after using it I can say that it worked well and it has been very useful for me.
I don’t know if there are any malicious hackers behind this app.
I would appreciate comments, thanks.
*Screenshot from my smartphone: