Apple debuts fourth betas of iOS 10.3, macOS Sierra 10.12.4, and watchOS 3.2

In what appears to be a regular release day, Apple on Monday made the fourth betas of iOS 10.3, watchOS 3.2, and macOS 10.12.4 available for developers to download and test.

The latest iOS 10.3 beta includes a new Find My AirPods, migration to APFS, and a new reviews API which limits how often an app can ask users to submit ratings on the App Store.

Also included in the iOS update is iCloud-connected device calling for Verizon customers, and a floating one-handed keyboard for iPad users.

According to an error message discovered in the first iOS 10.3 beta retained in Monday's release, an upcoming version of iOS will drop support for 32-bit apps entirely.

A new theater mode has been included on watchOS 3.2, enabling users of the device to prevent the screen from automatically turning on when the user's wrist is raised without completely turning off the device.

Monday's fourth macOS 10.12.4 beta version brings Night Shift mode to Mac. Originally incorporated into iOS, Night Shift minimizes user exposure to blue light from device screens during user-designated night hours, a technique thought to minimize impact on a user's circadian rhythm.

In addition to Night Shift, the update also brings expanded dictation support for additional languages, system APIs for PDF handling, and the usual bug fixes and performance improvements.

Apple's first macOS 10.12.4 Sierra beta arrived in late January, with developers granted access to the update two days prior to public beta testers.

Developers can update to the newest beta releases using the software update feature for iOS, and from the Mac App Store with registered hardware. Those interested in testing beta software before wide release can sign up for Apple's program via the company's official website.