Is there a way to detect if an Apple Watch is paired with an iPhone?

Question

I want to know if there's an API available that shows the availability of an Apple Watch. I don't want to write an Apple Watch App yet. I want to do some analysis to see what percentage of actual users have an Apple Watch, before investing time to develop a watch version (if possible, of course).

Answer 1

Swift 5

import WatchConnectivity

Then:

final class WatchSessionManager: NSObject {

    private override init() {}

    static let shared = WatchSessionManager()

    func setup() {
        guard WCSession.isSupported() else {
            return
        }
        let session = WCSession.default
        session.delegate = self
        session.activate()
    }
}

extension WatchSessionManager: WCSessionDelegate {

    func sessionDidBecomeInactive(_ session: WCSession) {}

    func sessionDidDeactivate(_ session: WCSession) {}

    func session(
        _ session: WCSession, 
        activationDidCompleteWith activationState: WCSessionActivationState, 
        error: Error?
    ) {
        print("Apple Watch is paired: \(session.isPaired)")
    }

}