OK.. found the answer to this the EAA website (6/27/17)
EAA AirVenture Oshkosh 2017 application, presented by Textron Aviation, is the official mobile app for AirVenture attendees. Whether you come to fly or come to watch, when you visit EAA AirVenture Oshkosh, you experience the World’s Greatest Aviation Celebration.
Be on the lookout on EAA social media, eHotline (our EAA member weekly newsletter), and the EAA website to get news on when the new EAA AirVenture Oshkosh App 2017 will be released and ready to download.
The EAA AirVenture Oshkosh 2017 application will make it easy to plan your travel to Oshkosh and experience everything that AirVenture has to offer. With a new, more user-friendly platform, the app will help attendees to navigate the grounds, discover more than 1,000 attractions, workshops and forums, visit over 800 exhibitors, and never miss a moment.
The official EAA AirVenture Oshkosh 2017 application will be available SOON as a free download on iTunes (supports iOS version 9 or higher) and Google Play. (supports Android version 4.4 or higher)