Other watch options than Apple and Samsung. What about Garmin? They make awesome watches.
Garmin makes excellent hardware quality with their smart watches, where they struggle is their software. It’s been a known fact for quite some time that the software tends to lag, can be inconsistent with software updates and generally just does not perform as well as watchOS for the Apple Watch.
But if you’re serious marathon runner or do triathlons of any of that type of sort, Garmin offers quite a few different variables for exercise components. Also, Garmins battery life is generally very good, but it’s also a very large watch, which obviously encloses a larger battery.