Following the steps of their comic book competitors Marvel, DC Comics has just released their own iOSself-branded comic reading app for iOS, built for them by Comixology.
Like the Marvel app, comics cost between $0.99 and $2.99 an issue, and there are some free comics available… although the selection of those is quite paltry compared to Marvel’s offerings, although no doubt this will change. The best freebie right now is probably a black-and-white comic by Neil Gaiman and Simon Bisley that portrays the Joker and Batman as actors working on a television series.
Otherwise, if you’ve used Comixology or the Marvel app, you’ll be pretty familiar with how the DC Comics app works. It really only trades in Spider-Man for Superman.