Substring is a fun, fast-paced word game. Race against the timer as you think of a word that contains a three-letter sequence, or "substring". For the substring STR, some words you might come up with are STRing, inSTRuction, or conSTRuct. Rack up points by typing in words quickly, and try out the easy, medium, hard, or custom game play settings for endless possibilities!

The differences between the Lite and Full versions are that in the Full version:

- you can play on all difficulty settings, including the custom setting

- you can compete against your friends by submitting your scores to the global highscore list

- you can share your best scores by posting them to your facebook profile