Wunderkit was entirely native. There were 0 iOS developers involved in working on Wunderlist with Titanium as you simply don't need native developers for Titanium code (the maintainers in the past were Javascript and front-end developers). I joined as the first iOS developer and worked on Wunderkit. Now all the developers work on the native client. There's also a lot of shared library code between the Mac and iOS team

Have you read the article? They're moving away from titanium to native apps:

> So we decided to rebuild Wunderlist for all major platforms (Web, iOS, Android Mac & Windows)

The android client hasn't been a wrapper for a long time, and the new iOS version we don't know, since it's not yet released.

They're rebuilding everything native :

> So we decided to rebuild Wunderlist for all major platforms (Web, iOS, Android Mac & Windows).