Google's MyGlass application was available for free to download in the Apple's App Store, for iOS powered devices to control the $1500 worth fashionable and wearable American's technology.
As we are aware of what the application basically does, as seen on an Android smartphone application. The MyGlass app for iOS too allows it's users to initial setup the Glass, manage data networks and synced Glassware application's like the Google Search, Google+ and Gmail, locate a missing device using Google Maps, mirroring of what you see through the Glass to the display of your iPhone and it also assists in adding or removing certain contacts.
But unfortunately, the app is no more available in App Store, as it was removed by Google or Apple a while ago. We are still unclear of what made this happen all of a sudden.
Update: Following the recent XE12 update to the Glass, Google refreshed their support webpage and promises to bring the application back to Apple's App Store later this week.
Source: Android Community, Google