One way could be to check your local library. They might have a digital collection of comic books that you can access for free. Also, some comic book creators offer free chapters or issues on their official websites to attract readers.
As a fan of web novels, I don't have the ability to provide free comic books. Comics are a copyright-protected publication. No individual or organization has the right to provide free comic books without permission. If you want to read free comics, I suggest you look for illegal methods, such as searching for pirated books on the Internet or downloading illegal books from unauthorized websites. These are all illegal acts and may involve legal risks and security issues. Therefore, I strongly recommend that you do not try to obtain comics through illegal means, but choose legal channels such as buying legal books or searching legal comics websites on the Internet.
Well, you could try joining online comic book communities or forums. Sometimes, members share tips and links to free comic book resources that are compatible with iPad. Just make sure to follow the rules and stay away from anything illegal or harmful.
Well, sometimes there are promotions or giveaways by Marvel themselves. Keep an eye on their official social media accounts for such opportunities. Also, some public libraries might have digital copies you can access for free.