Today, PEF goes mobile with the iOS app PEF Viewer. The app is an open source initiative enabling easy access to PEF-files on the go. With PEF Viewer you can open PEF-files received via e-mail, Dropbox or other sources. The viewer can display braille patterns or one of several translations. It is also possible to navigate to a specific page, section or volume.
The primary target group for the app is braille producers and not braille users (as one might have expected). This is mainly due to limited development resources and lack of proper testing equipment. If you feel that this is outrageous, you are encouraged to amend the situation by contributing to the project on GitHub.