Did you confuse on how to update all apps in itunes 11 at once. Don’t worry. I’m going to tell you how to do it. It’s very easy. All you have do it. Open up itunes in your computer and click on Apps on left sidebar. If it’s not visible click View -> Show sidebar.
By default you can see all apps you have installed with a nice red Update ribbons if that apps has updates. If you see the bottom right corner, you will notice there is no button to update all apps once. If you want you can update single app by right clicking on it. But it is time consuming if you have more apps to update. On top you can see Updates link. Just click on it and it will open up all apps you have updates. Now if you look at the bottom right corner. You will notice Update All Apps button is visible. Just click on it and you are done. In my opinion it is must to update your all apps on your iphone, ipad and ipod periodically. It will bring you latest bug fixes as well as new features as it available.