Halide You can't have a great photography experience without first having a great camera app and the default Camera app on iOS is just not good enough. While there are many great camera apps available for iOS, Halide is one of my favorites, as it combines all the essential features in a simple and easy to use design. With Halide, you get all the basics, such as exposure compensation, manual focus with focus peaking, ISO, white balance, live histogram and RAW capture. There is also a 3x3 grid, with level meter for vertical and horizontal orientation. What I also like about the app is...
Source: http://www.gsmarena.com/essential_photography_apps_for_the_iphone-news-26219.php