Readdle, the developer behind some of the most popular productivity apps for iOS, has discounted a few of its best offerings for Black Friday. Some of which are down by as much as 80%, while PDF Expert for iPhone is now completely free. We’ve got a complete list of the reductions below, but remember: they’re only for a limited time, so grab the while you can.

We love Readdle’s productivity apps here at Cult of Mac, especially when they’re going cheap. The company is currently holding a Back to School campaign that sees a number of iOS apps that “are indispensable for studying” reduced. Those included are ReaddleDocs for iPhone, ReaddleDocs for iPad, and Remarks.