According to Wiki it’s about 48% The only “poor” team we played in 3 seasons was Gretna. Liverpool, Arsenal, Everton as a lower league side v Leeds Utd U21. It’s a bollocks stat.
I've got one in the car, amazing bit of gear for £30. No idea about other options. As they need to be able to connect to the internet and Apple can do that by allowing them onto any passing iPhone.