The biggest new feature appears to be a revamped Music app that includes a streamlined version of iTunes Radio. It comes amid rumors that Apple is set to debut a new music streaming service sometime around WWDC 2015 this June.
The developer release of the iOS 8.4 beta comes just under a week after Apple released iOS 8.3 to the public, so the company appears to be intent on keeping up momentum through the spring.
While today's beta release is developer-only, iOS 8.3 went through a period of invite-only public beta testing, so it's possible that iOS 8.4 may do the same.

iOS 15 will reportedly ditch the original iPhone SE and iPhone 6S
Apple's iOS 15 launch, expected in September, will reportedly kill off a number of iPhones and iPads.

Massive Apple VR leak reveals headset price, release window
A new report from Bloomberg's Mark Gurman says Apple's first VR headset will cost well over $900 and have a chip faster than the M1 Mac.

Morgan Stanley raises Apple target share price, expects earnings record
Morgan Stanley has raised its target price for Apple stock ahead of what it expects to be an "all-time record" in quarterly earnings.

Keep your hands free and your eyes on the road with a magnetic car mount!
While texting and driving is dangerous, navigating your way around town is essential. Make sure you do it safely by getting a car mount and there's likely no easier car mount solution for your phone than a magnetic mount. These are the best of the best!