Watch Kit app with Watch OS 1 and 2

Question

I have some question regarding Apple Watch apps, As per Xcode 7, there is two target for Apple Watch, one which is supporting OS 1 and second which is supporting OS 2. So is it means, If i choose OS2, my app will not run in watch which is having OS 1? Or Similar, If I choose OS 1, my app will not run in watch which is having OS 2?

Can you please explain that?

Answer 1

WatchOS 1 and 2 are fundamentally different. The first one only take data from phone, when second one embed executable code directly on the watch.

I think old app for WatchOS 1 works on WatchOS2, but the reverse isn't true for sure.

Answer 2

是，如果您在手表os1上运行，则这将不支持手表os2，反之亦然，两者的功能都不同...因为手表os 1没有内存来保存iPhone应用程序的数据，而手表os2则有内存来保存iPhone应用程序的数据...

Answer 3

From general reading, theres been no negative reviews of WatchOS 2 compared to 1, the only thing mentioned is further improvement. What I'm getting at is the number of users still using WatchOS 1 now if likely to be absolutely minimal as there is no reason not to upgrade, it really is a no-brainer.