Dynamic Light is an app that allows you to apply a range of HDR effects to an image from your library or one taken with the phone or ipod touch camera.
This is the main interface.
Choosing an image from the library opens the image with the default HDR effect applied but not adjusted.
Tapping the FX button brings up the first of the FX pages.
Selecting an effect applies the effect with the default optimisation.
Moving the indicator on the wheel to the right increases the effect.
Moving it to the left decreases the effect, simple.
You can also adjust the lighting focus.
by moving the focal light source.
Tapping to OR icon displays the original and adjusted image side by side.
Select your save option
Saving image
Completed image
Art + Photography 
