If you want to add credit to your account to buy music later without navigating the store interface immediately: Buy an Apple Gift Card from major retailers or online.
Tap the next to the item to purchase it using your Apple ID. buy itunes music without itunes
If you are on an iOS device, you don't need the "Music" app to buy songs; there is a dedicated storefront. Open the app (the purple icon with a star). Search for the song or album you want. If you want to add credit to your
The music will then appear in your library across your devices. buy itunes music without itunes