Whenever you want to purchase apps for iPads or iPods you must have an iTunes Store account. This holds true for apps your department may buy for you. Whether or not your department purchases apps for you or if you use an iTunes card you will receive a code that looks something like this:
Open iTunes on your computer. When you select iTunes Store sign in from the top right corner of the screen or click on the down arrow next to your account name if you are already signed in. You will see the option to “Redeem”.
When you click on it you will enter the code provided you by your department and iTunes Store will automatically use that code to enable you to download just the app the code was intended for. If you are redeeming an iTunes Card then the total value of the card will be reflected on the screen every time you login to iTunes.
Purchased apps will be downloaded to your iTunes Library and be added to your iPad/iPod the next time you plug it into your computer and sync. This method creates a backup file for you in case you have any problems with your iPad/iPod at any time.
If you have a wireless connection then this same process can be done directly from your iPad/iPod when you select the App Store app that was preloaded onto your device.
1- From the bottom of the App Store app window tap on “Featured”.
2- Scroll all the way to the bottom of the screen and select the “Redeem” button.
3- You may be directed to sign into your iTunes account if you aren’t already
When you add apps wirelessly the next time you sync your iPad to your computer you will want to choose from “File” on the menu bar “Transfer Purchases”. This will create a backup file of all the contents on your iPad once you finally select “Sync” from the bottom right hand corner of the iTunes window.