Hello guys!! welcome to my channel. This my first video on top 10 iPhone 4 apps of The apps which i. By now you've got your go-to apps on your iPhone. But if you've been wondering what to add next, take a look at our top 20 must-haves. The following are the top free iPhone applications in all categories in the iTunes App Store based on 4 ():: YouTube - Watch Videos, Music, and Live Streams.