In a statement given to French site iPhoneAddict, Instagram said the Instagram Apple Watch app was built using the watchOS 1 SDK, which was obsoleted by Apple on April 1. Rather than putting effort into rebuilding the app, Instagram has decided to end support for the wrist-worn device.
"The Instagram app for Apple Watch will no longer be available as a stand-alone experience once users upgrade to Instagram version 39 on iOS, released April 2, 2018. We are committed to providing users with the best experience with their Apple products and we will continue to explore ways to achieve this on all platforms. Users with an Apple Watch will continue to enjoy a great Instagram experience through various rich and varied notifications. "Apple last year began notifying developers that Apple Watch apps need to be native apps built with the watchOS 2 SDK or later as of April 1, 2018. Apple first began requiring new apps to use the watchOS 2 SDK in June of 2016, and watchOS apps that continue to use the watchOS 1 SDK can no longer be updated. Apple now requires all new watchOS apps to be built using the watchOS 4 SDK.
Instagram has had a watchOS app available since 2015, and it was one of the first companies to support the Apple Watch when it first launched. The app was designed to let you view and like photos from the social network on your wrist. Instagram features will continue to be available on Apple Watch, but through notifications sent to a linked iPhone.
Instagram joins several other major companies that have abandoned development for the Apple Watch and eliminated their watchOS apps, including Twitter, Google Maps, Amazon, and eBay.