Hi All,
I'm not sure how interested people are about this, but I've created a all in one app that allows you to download and read stories from fanfiction.net. It lets you read stories offline, and to check your saved stories for updates at any time.
You can find the app here
Fanfiction Reader.
Its still pretty rough, but I find it to be useful in reading on my Android device. Please let me know if you have any issues with it, or if you have any feature request.
Thanks!