The folks at Readdle make some of the best productivity apps for the iPhone and iPad, and for two days (beginning on Black Friday) all their apps will be up to 80% off. One of their most popular apps, PDF Expert for iPhone will actually be available for free!

Readdle only has huge sales like this twice a year, so if you've been eyeing one or more of these apps, now's the time to snatch them up! If you do pick any of these up, let us know which ones and what you think of them!