Show HN: Fantasymath.com – math based, matchup specific fantasy football advice
www.fantasymath.com
In FF, the goal is to pick a lineup of players that outscore your opponent's lineup. In real life, these players are often the same team/playing each other, and so their performance is correlated (e.g. a QB throwing to a WR). The fantasymath.com model takes these correlations into account in order to give you a slight edge when setting your lineup (apart from that, the rankings are basically the "fantasy consensus" or wisdom of crowds, set to distributions).
Do everything on this myself. I'm a modeling guy by trade, and had to learn all the back and frontend stuff myself. The frontend is React + Redux. Used the React framework Grommet, which I really like.
The backend is in Flask and Google App engine. Other really helpful things were Auth0 and Stripe.
Audience is hardcore Fantasy Footballer's who are mostly interested in whatever edge they can get, so charge $40. Have a decent amount of subscribers, but definitely not enough to cover time spent (which is OK! have learned a ton).