What IOT solution should I use?

What’s the most up-to-date IOT solution for samsung wearables? There seems to be conflicting information in the documentation. This page tells me to use Iotivity:

But this page tells me to use SmartThings:

But this page tells me to use Zigbee:

Which solution one that works for Tizen 4.0 and 5.0 with long term support from Samsung?