

I would imagine they use the microphone, accelerometer, some processing power and internet connectivity (WiFi or mobile).
Trying to set up a dedicated hardware with ask that would cost way more than just buying a bunch of pixel phone.
Same for the software, on a smartphone you can just create an app that will record and process all the information vs creating a custom firmware on a custom hardware.
I guess there is also the availability of the technicians.
Finding someone to develop and maintain an android app is much easier than finding someone to maintain a custom hardware/firmware.
It’s great that school are surveiling kids.
Does it means that school will finally get an appointed psychologist that meets the kids regularly to check on their mental health ? This way if there is any sign of depression they can easily get some free counseling sessions ?
What do you mean “This is not how we do things here !” ?