The parallax trend has been happening for months on web pages. Apple will popularise the trend in iOS apps though that was related to device motion and is bit

The parallax trend has been happening for months on web pages. Apple will popularise the trend in iOS apps though that was related to device motion and is bit different to what's happening on the web. On the point of Apple, usually this sort of parallax doesn't work within Safari on iOS devices as scrolling in iOS pauses the main run loop of code. Looks like they've found a work around here, so kudos it's actually functional, but scrolling performance appears to suffer terribly.