If you manage to install the app but get a "This app is no longer compatible" error upon opening:

: You can use this tweak to downgrade the app to a specific working version (such as version 13.15.0) via Cydia. Safe Sources for IPA Files

A Cydia tweak that lets you "downgrade" apps to specific versions (Version 13.15.0 is widely cited as the stable choice for iOS 9).

Ironically, the best way to watch Netflix on iOS 9.3.5 today is .