Brain Games: IQ Challenge is a free iPhone game developed by Gamejam Co. It is a fun and addictive brain game that will test your IQ with a variety of questions. The game has a simple interface and easy-to-understand gameplay. The questions are imaginative and fun puzzles that will challenge your mind and test your knowledge.

The game features super smart teasers that will make you think outside the box and increase your smart power. There are also ducks and more mind teasers to keep you entertained. You can play alone or challenge your friends to see who's smarter.

One thing to note is that the game offers a VIP membership subscription for $3.99 per week. The subscription includes a new exclusive daily puzzle every 24 hours, keys rewarded upon completing daily puzzles, and the removal of all non-optional ads. The subscription is auto-renewable and can be turned off in the settings after purchase.

Overall, Brain Games: IQ Challenge is a great brain game that is both fun and challenging. It's perfect for anyone who wants to test their IQ and improve their problem-solving skills.