Download IPA file from download page. Download page
Drag-and-drop IPA file onto Library - Applications in iTunes. On Mac, you can just drag it onto the iTunes icon in the dock.
Verify that the application shows up in Library - Applications. Note that it will not have its normal icon.
Connect your device.
Select your device on iTunes.
In iTunes, choose the Application tab, select the application that you want to install.
Click on "Install" button. This will change to "Will Install"
Click on 'Apply' button on right corner. This will initiate process of app installation. You can see status on top of iTunes as well as app on device.