It's really irritating that the xkcd website doesn't automatically redirect to the mobile site. The mobile site allows you to easily see the alt text, which is an integral part of the comic. This app will redirect for you. It's free and requires no permissions.
You don't ever need to manually run this app. In fact, you won't find a shortcut in your launcher after installing. It will only try to run when you open an xkcd URL link.
How to use:
* Open an xkcd URL from an app like Gmail or even the browser
* Set xkcd2mobile as the default
* Enjoy!
Open source, forked from "Redirect For Youtu.be" with some changes.