Features:

Comic Browser:

- Offline Mode
- Notifications
- Long press to view alt text
- Overview Mode
- Open Reddit or Forum Thread
- Search for title, transcript or number
- Share comic url or image
- Add comic to favorites
- Open links from xkcd.com and m.xkcd.com
- Support for large images (e.g comic 657)
- Explain xkcd integration
- Option to display alt text by default

What If?:

- Full support for footnotes, formulas and alt text
- Offline mode and notifications
- Mark articles as read and hide them
- Swipe between articles (disabled by default)
- Quick search for article titles
- Random articles

General:

- Custom themes
- Material design elements like Snackbars, Floating Action Button, tinted Status Bar, animations....
- (Auto) Night mode (with option to invert comic colors)

In-App Purchases are just used for donations, the app is completely free!
Easy xkcd is Open Source! https://github.com/T-Rex96/Easy_xkcd