Author Cameron Tuttle has adapted the theme from her Bad Girl’s book series into a new journaling app called, The Bad Girl’s Journal.

Rather than working with a traditional publisher, the author teamed up with tech company Hard Boiled Industries to create the app.

The $.99 app, is a virtual journal where bad girls can save their stories and color code them based on the topic and their mood. App users can choose from different themes, as well as a customizable fonts and colors to create their journal entries. They can also add photos, which can be vamped up with virtual stickers like fake mustaches and devil horns.

The app also includes some games, such as the “Ask a Bad Girl,” tool that lets users ask advice from three invented “Bad Girls.”