onOne Software has released Perfect Effects 4 Premium Edition and Perfect Effects 4 Free Edition. Both programs offer a library of photographic effects and tools for image enhancement and creative stylisation. Each may be used as a standalone application, as an external editor for Apple Aperture, Adobe Lightroom, or as a Photoshop plug-in. The main difference between the two editions is that Perfect Effects 4 Premium Edition provides photographers with more than 400 photographic effects sorted into more than 40 categories, whereas the free version includes 70 photographic effects while maintaining core functionality and usage without the restrictions of a traditional 30-day timed trial or the addition of watermarks to images. Both Perfect Effects 4 Premium and Free Editions are now available from onOne Software. New users may purchase Perfect Effects 4 Premium Edition for $99.95. Owners of Perfect Effects 3 or PhotoTools 2.6 and earlier may upgrade for $69.95.