Step 1: Open the Settings app on your iPhone, iPod touch or iPad with iOS 9 or later.
Step 2: Now navigate to the General > Spotlight Search section.
Step 3: Finally, toggle off Burner. And should you want to include an app in Spotlight’s search results, just flip its switch to the ON position.
Tip: While disabling an app prevents its content from appearing in Spotlight, you can still ask Siri to open it or use Spotlight Search to locate the app by typing the first few letters of its name.