I work on the iOS app and I found this question because it is on MSE and tagged with ios-app, so yep. It's the best way to let us know about bugs, feature requests, etc.
We also look at app reviews but they're one directional (at least for iOS) so there's less we can do for you there.
Issues with the mobile applications affect more than one Stack Exchange site and therefore belong here on MSE.
Android App post - "Let us know how we’re doing" section.
iOS App post - "What about feature [...]?" section.