There is no ‘good alternative’ to the Apple Watch, because the Apple Watch is it’s own entity. If you want something that’s a ‘middle ground’ smart watch that would be considered universal for both android/iOS, then look at a Fitbit as an example.
I think people seem to misunderstand, what makes the Apple Watch so unique isn’t necessarily just all the functionality that it offers, [because it is a great multi tool], but it’s how it’s synchronized watchOS is with iOS. It’s not just an extension of your iPhone anymore, it’s also on the most advanced health tracker on the market. There’s a reason why the Apple Watch is dominated so greatly over the past 24 months, with great features like fall detection/wheelchair accessibility/EKG, ect.
Not many of the competitors are on the level the Apple Watch is right now, which is why it’s wearables for Apple has skyrocketed in the last year.