Ask ruuvi, Ruuvi can count.
Count what you ask?
Anything that passes between a pair of tags or between a ruuvi and another BlueTooth device.
Like live things, people, cattle, chickens, deer anything that would interfere with the signal strength.
do you have some example of how much signal strength change?
As an example a person move trough a small room (10m^2)
Hear from you