Apple to Stop Accepting Updates to watchOS 1 Apps on April 1, 2018
Apple today reminded developers to update their Apple Watch apps to take advantage of features introduced in watchOS 4 and Apple Watch Series 3, like increased performance, new background modes for navigation and audio recording, direct connections to Core Bluetooth, and more.
Apple also announced that starting on April 1, 2018, updates to watchOS 1 apps will no longer be accepted. All updates must be native apps built with the watchOS 2 SDK or later. Newly submitted watchOS apps should be built with the watchOS 4 SDK or later.

Apple first began requiring new apps to use the watchOS 2 SDK in June of 2016, and now that will also apply to app updates that are submitted. watchOS 1 apps that are not rebuilt using watchOS 2 SDKs or later will no longer be able to be updated after the April 2018 deadline.
Apps built with the native support features that were first introduced in watchOS 2 are able to run more quickly and operate more smoothly on the Apple Watch.
Popular Stories
Apple's "Surprise and Shine" event kicks off today at 10:00 a.m. Pacific Time, where we're expecting to see the foldable iPhone Duo, the iPhone 18 Pro and Pro Max, Apple Watch Series 12 and Ultra 4 models, new AirPods 5 earphones, and perhaps some other announcements.
Apple is providing a live video stream on its website, on YouTube, and in the company's TV app across various platforms. We...
Bloomberg's Mark Gurman today further outlined what to expect from the Apple Watch Series 12 and Apple Watch Ultra 4 set to be unveiled on September 9.
While it was initially rumored that Touch ID may be coming to the Apple Watch this year, Gurman reiterated that he does not expect the Series 12 or Ultra 4 to have any major design changes compared to the current Series 11 and Ultra 3 models.
...
Apple's biggest event of the year is almost here, and all eyes are on Cupertino. With the first foldable iPhone expected to headline Apple's "Surprise and Shine" event on Wednesday, September 9, at 10:00 a.m. Pacific Time, the rumor mill has been running full throttle, fuelled by the biggest single design change in the life of the iPhone.
To get you up to speed, here's a quick reference...