
A significant number of users on Reddit and Twitter, corroborated by multiple tips we have received, are affected by an ongoing App Store issue preventing a number of popular iOS apps from showing up in search results unless already installed, including Google, Periscope, Spotify, Tidal, Tumblr, Uber, Vine, Waze, and many others.

The search issues appear to be widespread, affecting iPhone, iPad, and iPod touch customers throughout the U.S., Canada, Europe, Hong Kong, and elsewhere since early Thursday morning. Apple has yet to update its System Status page with any reported issues as of 6:00 a.m. Pacific, but it has historically been slow in reflecting outages.
Update: The search issues also appear to extend to iTunes and the Mac App Store.

Update 2: Apple is aware that users have been "experiencing a problem with the App Store" since about 2:00 a.m. Pacific. Apple is "investigating and will update the status as more information becomes available."
Update: Apple's System Status page indicates the App Store issues were resolved shortly after 8:00 a.m. Pacific. Search results now appear to be functioning normally.
Article Link: App Store Experiencing Widespread Search Issues [Updated]