Check Sim Software

Welcome to Check Sim Software, developers of the Mac app Mark Book Builder.

Are You an Indie Author or Want to be One?

Sign up for the Check Sim Software newsletter and get a free ebook with the best places to publish your books in order to reach the most readers and keep as much money as possible from each book sale. You’ll also receive tips on publishing your own books.

Use the form on the sidebar on the right side of all the pages on this site to sign up for the newsletter and receive your free book.