A Football App Shares Strategies With Coaches

Football is a complex sport, with millions of options for each run or pass play. For coaches, the biggest challenge is in finding the time to dream up new strategies that will work from year to year. That's difficult enough when you're a pro, but it's an almost insurmountable task for the part-time coaches in the high-school, small-college and youth-league ranks.

Photography by Jody Horton

All X's and O's: Former NFL assistant coach Charles Coiner.