Beerbase
Having the work phone has made me think about how I can do tedious things more easily. Now something I do quite regularly is brew beer, and my fellow brewers asked me to keep track of our brews in a database so we can learn from what we've done before.
And of course I knocked something up in Access, but then I had the problem of carrying bits of paper around, and of having multiple versions of the same database.
So instead, I've created a database on a server with an upload page, which loads up very nicely in the phone. So now I can update the database using the phone, while we make the beer! Yay! I made an app!!!

(It's a bit hard to see the field names, but trust me - they're there.)