I've been extremely busy funding a company and making it work, therefore just yesterday or the day before I've managed to find the time to put the web app up and running:
http://filterbet.win
Bookmark it and use it before placing your bets, in order to get rid of the obvious long term losers.
Do you have some friends that are really bad at sports betting and would benefit from it most? Is the Dunning-Kruger effect really strong with them and they actually believe their picks are golden, yet unlucky? Or are they the kind that only remember the winners? Since the web app is not very complex at the moment, they will benefit from it most currently.
Also you'll notice that I've added a method in which we can collaborate in order to improve it. It needs tuning and improving and it can become the go to tool for everybody before placing their bets.