Free Comics Books is an Android app developed by Placeholdevs Labs that provides access to over 20,000 public domain comic books. The app has a vast collection of comic books categorized into genres such as fantasy, sci-fi, child, superhero, horror, and war, among others. The app also has a large library of comic books from the years aroundthat can be downloaded and read in offline mode.

It's worth noting that Free Comics Books only contains books whose intellectual property rights have expired and are available for sharing under the Public Domain. This means that users can enjoy the vast selection of comic books without worrying about copyright infringements. The app is free to use and provides users with an excellent resource for comic book enthusiasts looking for classic titles to read.