Many users wonder about sharing their apps, especially if they are new to Apple products. Let’s say you have an iPhone with a bunch of purchased apps. Later, you bought an iPad. So, the question is, “Can I use my apps on the new iPad?” You can use your iPod/iPhone apps on the iPad and you don’t have to re-purchase them.
You may transfer purchases when syncing the iPad with the iTunes library. You can also re-download your App Store purchases. Unless the apps are “universal” – as indicated by a plus symbol against them in the app store – they won’t be coded to make full use of the iPad’s larger screen. By default, they will take up only an iPod/iPhone sized portion of the screen. When you are in the app store, apps with a “+” sign next to them are compatible with the iPhone and the iPad.