WordBrain is a free video game app that provides you with hundreds of word puzzles. The goal of the game is to combine letters to create words, and each level will feature a minimum of four letters from which you must create a word. The catch is that you can create any possible word with the letters, even if it isn't the correct word that the app wants.

There are over 700 levels in this game, and each is slightly more difficult than the last. The simplest puzzles at the beginning only contain four letters, but they quickly gain difficulty. In no time, you'll have to create two words from a selection of nine letters.

In case you get stuck on one of the puzzles, there is a comprehensive help and hint system integrated with the app. The hints reveal the correct letters in order, so use them wisely. You only gain clues when you finish an entire section of puzzles. The app is fun, engaging, and it has an excellent design. You can even build your own puzzles in the app. Once created, you can share them with other players online, and you can download other puzzles created by the community.