I used the Wikimania Android app during the conference.
https://play.google.com/store/apps/details?id=io.eventspark.wikimania2014

Obviously, it is not up to par with conference apps, like the Google I/O app.

Are there any plans to get an official app for use for subsequent conferences of Wikimania? Or sponsors who happen to be app developers will do us the honor?

I think this year's event was the tenth Wikimania. Launching an app to celebrate that wouldn't have been a  bad idea.

The app link above says "official Wikimania app", but not very official to me as was built by one of the sponsors of the event.

Rexford | google.com/+Nkansahrexford | sent from Smartphone