There are some for iPhone also although its not the same one -- as I have an iPhone also but the couple of apps I have found have been very "amateurish" and didn't come with much customization. But this was a year ago so who knows the same company may have released something for iPhone too.
I tested a few and this was the one I stuck with. It was a little pricey but well worth it for me.
You can probably google for more but here is the direct product link:
https://appworld.blackberry.com/webstore/content/1603