In a blog post, Apple has warned developers that all watchOS apps need to be native apps by April 1. Apple will no longer be accepting updates to watchOS 1 apps after that date, meaning all submissions will have to be built with the watchOS 2 SDK or later, and new apps “should be built with the watchOS 4 SDK or later.” It appears that existing non-native apps will likely still remain on the App Store after April 1, 2018, however developers…