This version of the yalu jailbreak supports the iPhone 7 and iPhone 7 Plus on iOS 10.0.x to 10.1.1. It also has Substrate support built-in and presumably is more stable than beta three.
You can download the extra_recipe+yaluX beta 4 iPA from here.
● Where to Download Yalu Jailbreak From
● How to Jailbreak Your iPhone on iOS 10 Using Yalu and Cydia Impactor (Mac)
● How to Jailbreak Your iPhone on iOS 10 Using Yalu and Cydia Impactor (Windows)