The current Netflix app (version 15.x and above) requires for full functionality, including newer codecs (HEVC), DRM protocols (Widevine Level 1), and security frameworks. As of late 2021, Netflix ceased updates for iOS 9 and iOS 10. The last compatible Netflix version for iOS 9.3.5 is Netflix version 9.0.0 (build 20xx), released around 2018.
: Offline viewing (downloading titles) is generally not supported on versions earlier than iOS 12 . download netflix for ipad version 9.3.5
If you have never used Netflix on an Apple ID before, the old iPad might not let you download it. The current Netflix app (version 15