In general, Google tends to do well to support its software on iOS; so obviously, many have wondered whether Google would bring Android Wear support to iPhone users. The move wouldn't be unprecedented, because Google has made Google Glass compatible with iOS. And, Android Wear product manager Jeff Chang isn't ruling out Wear support either, saying:
That is quite far away from a full confirmation, or even an indication that cross-platform support is coming for Android Wear anytime soon. But, it's always good to hear that the plans are at least in the mix, even if we have to assume that it would only be a matter of supporting iOS, and no other non-Android devices. We all know that Apple Wear won't have cross-platform support, and Samsung hasn't made any indications of expanding compatibility for Tizen.