iPhoneClimber.com outdoor guidebooks allow you to search for waterfalls textually or by other properties such as rating, proximity, or difficulty of hike.
Browse through the list of waterfalls to find exactly what you are seeking.
The offline maps show waterfalls and trails so you can find your way even when you don't have a cellphone signal.
Enjoy beautiful high resolution imagery of each waterfall optimized for the Retina display of your iPhone. Nothing can compare to the beauty of the falls themselves, but these images will inspire you to hike out and see them for yourself!