5/5 rating based on 136 reviews. Read all reviews for xkcd: Open Source for iPhone.
xkcd: Open Source is free iOS app published by Michael Amaral
action-owl
This is how you make an awesome and free app. It stays true to XKCD, I don't know if it could be any better. All the little details and solid design make this a winner. Oh, and the best part? It's only 21mb!
VanillaZombie
The wonderful xkcd strips, all in a convenient app. I would occasionally remember to go to the website to catch up on strips, but the app makes it fast and easy. No ads, either.