Geared HD is a puzzle game in which you have two gears that need to be connected. On a level you are given so many gears of different sizes and the goal is to use all the gears to connect the two gears that you started with. The app says that there are 150 levels, so I'll take his word for it because I'm not spending that much time with this app. We are seeing more and more puzzle games on ios devices which I think is a good thing however I don't like this one. I do like the simple layout with the graph paper but after short while this game becomes boring. Some games have that "it" factor that grabs you and makes you want to spend hours playing but not this game. However if you are a puzzle junkie than if it's still free it might be worth checking out.