The APNG reading, editing and authoring toolkit, AREATK, is a toolkit which uses the official libpng to read, edit and author Animated PNG, APNG, files.
The core of AREATK is a library called libapng. This library provides extensions to the standard PNG library, libpng, that support reading and writing the additional PNG "chunks" designed to support animation.
The library relies on the API of libpng 1.6 but does not require a specific version of libpng.