Yes, MewConnect is the only official application that MEW had launched. Any application other than that are likely traps laid out to steal your information.
But I think MewConnect requires to be connected to MEW through desktop to work. (haven't tried yet but seems like it from the guide:
https://kb.myetherwallet.com/posts/mewconnect/mewconnect-user-guide/)
Thanks for adding those info so OP that's their official app that you've been looking for. Follow the details that were given to the instructions on that link so that your MEWconnect app will be connected to your MEW accounts. As said, don't ever download anything on the web that looks like the MEWconnect and just download both android and iOS app on respective links.
I don't see the point for MEW to release its wallet on a mobile platform. They are already quite a lot in the app stores. Instead, they improve their platform and they are good at it.
If you are following the discussion, there's already an app for both iOS and android.