http://iscoresports.com/

I keep stats for our local high school football team. Would you also have an offline/paper stat sheet that accompanies your app so that we have a backup or something to use as a cross-reference and ensure our stats are correct?

the app is generally considered 'self contained'. though in game, many use a clipboard and paper copy in tandem till they get fully comfortable with electronic scorekeeping. the app does provide reports and ability to emailHTML and excel stats .. so you can have off line copies.

In baseball you can print the scorecard which is formatted like the traditional paper score sheet if you want to check against someone after the game. I am not sure if football has a similar option.

With football you can email yourself the game summary PDF which includes full statistics, scoring plays, and even a complete play by play listing.