[Glide]

Slack's desktop app is a web view. The iOS app is native.

I think the wells fargo banking app on the phone is not native. The At&t one doesn't feel like it. Usually there's something different about the controls and interactions that make it not feel native. Sometimes there's a dead giveaway like being able to double tap and accidentally zoom in just like in mobile Safari.

[rubiquity]

Yep! A common pattern is for the navigation to be written in the native language to take advantage of faster/smoother animations and all dynamic content is inside of web views.