I agree that the Excel spreadsheet way works just fine. I used to use a demo version (free) of TurboStats on a Palm, then transfer them to an Excel spreadsheet. It sounds like your situation might call for a "pencil and paper" method, which is just as good as anything.
The good thing about pencil and paper is that you can make up your own "shorthand", because YOU are the one that will transfer it to a computer later. So you can draw pictures, doodle, or any kind of chicken scratching - as long as you can decipher it later.
My stat purposes were a little different than typical - I was looking for things like type of pitch, pitch location, number of pitches per batter, etc. For instance, I wanted to go back and see:
How many changeups she threw in the game
Changeups per batter
Pitch location of those changeups
What was the count when the changeup was thrown
etc. etc.
So, the idea of building your own homebrew spreadsheet is helpful for your DD, and provides great feedback for her pitching coach. You can purchase software, but in most cases you have to conform to what the software offers - but with Excel, you can build what you want. If you're not familiar with Excel, I'm betting either your DD or one of her friends is, because most HS kids have taken a computer applications course that includes Word, Excel, and Power Point.
Hmmm... This gives me an excuse to build an app for Android based phones!