Has anyone heard of this device,
http://flightscopemevo.com/#!/#mevo-for-baseball
It seems small and not too expensive for tracking velocities, spin rate and exit velocities compared to the competition. I see that they have a higher level product called strike. The price $499 compared to $299 for a pocket radar or 3k for rapsodo device (plus monthly fees).
I have seen some reviews for the golf product which seem slightly mixed compared to higher end products, but generally positive.