Four in a Row HD has been a success in the Play Store thanks to its features like hard AI, brain teasing puzzles and no-frills online multiplayer.
Admitedly, its user interface was not on par with the current Android user interface standards. But not anymore, Four in a Row HD has been redesigned, simpler organization of options, better action bar, new view pager for fast and visual riddles navigation, cooler themes and more subtle interface enhancements.
Just check out the before and after screenshots...
Enjoy the game, and thanks for your support!