Music Bookmark is the perfect app for your iPhone. With this application, you can easily save bookmarks for your tracks. You can split a long track or a book into pieces, and play it anytime you want. Also, it has fancy, stunning user interface.
Besides that, you can:
-Edit your bookmark, add or subtract seconds
-Edit your bookmark title
-Select background image or color
Album Flow Pro 
iBattery information 
Gravity Golf