It came with my phone. I joined enlightened. Haven't touched it since I got the game. Ain't nobody got time to walk to a random place, pull out their phone, and waste data and battery on trying to "capture" places.
Don't get me wrong, it's a cool idea, but it isn't that good.
I did it for a few weeks when busy around town. Mostly just crossing the street at work to recapture a node that was this old church.
Turns out this 80 year old woman in a scooter was the one who kept taking it back. She was super mad it was me with my working legs that had been setting her back all the time.