New Apple Watch apps must work without an iPhone
Apple informed developers that Apple Watch apps must be native apps built with the watchOS 2 SDK or later, so that cuts out the need for an iPhone.
The Apple Watch is becoming more of a standalone device. Apple recently sent a note to developers informing them that "all new watchOS apps submitted to the App Store must be native apps built with the watchOS 2 SDK or later."
This software update gave the Apple Watch to connect to Wi-Fi itself. This basically means that apps on the Watch won’t need to depend on a connected iPhone.
Developers also got their hands on a Software Development Kit (SDK) for building native apps that didn't rely on the iPhone as part of this update. Apps that want to keep their place on the App Store will have to be updated to meet this new requirement.
Apple is expected to unveil the Apple Watch 2 at WWDC in June; this wearable is rumoured to get a significant spec boost and could be thinner too.