The fourth developer beta version of iOS 8.4 has been released, along with the third beta for AppleSeed testers.

Apple has released the latest beta of iOS 8.4, both to developers and their AppleSeed testers. Both groups can download the latest beta over-the-air to a device running the previous version, while developers can also grab it from the iOS Developer Center.

When it launches to the public later this month, iOS 8.4 will contain the revamped Music application, along with support for Apple Music, Apple's streaming music service. Apple Music will launch on June 30 with a three-month free trial, after which it will cost $9.99 a month for individuals, and $14.99 for families of up to six people.