You can use various photo apps to add beautiful filters to your photos, but if you want to create gorgeous depth of field effect, the photo app Big Lens should be more suitable for you.
Big Lens is a versatile photo app designed to offer you an easy way to generate DOF effect for your photos via your iPhone or iPad. The iOS app has an intuitive and reasonable user interface, and allows you to import photos from your camera roll or directly take photos in the app, while smart focus system lets you simply use your finger to focus your images, and you can also choose advanced mode to manually define your focus area. Moreover, the photo apps also features 9 unique lenses and more than 18 filter that allow you to create gorgeous effects for your photos. Of course, when finishing your works, don’t forget to share your masterpieces via Email, Facebook, Picasa, and Dropbox.
Big Lens with a size of 38.6 MB is compatible with iPhone (optimized for iPhone 5), iPod touch and iPad running iOS 4.3 or later. The iOS app is free for a limited time at present. If you’re interested, jump to App Store for more details.