Ipad air cannot get full garageband instruments
I bought an ipad air today, i am able to download apple apps such as keynote, pages, imovies, etc for free. i am also able to download garageband. However i cannot play all instruments in the app. The app told me to buy app if i want to play. I owned an ipad mini and i have downloaded garageband on the ipad mini for free before. How can i solve this problem?
iPad Air Wi-Fi, iOS 7.0.3, 32gb