The Tizen-powered Gear S2 smartwatch works with all Android smartphones, not just the ones made by Samsung, so the possibility exists that at some point the company might even enable it to work with iOS devices as well. Samsung did say back in September that it was looking at the possibilities to open up the Gear S2 to iOS and according to the new report this might happen in the near future.
Apparently Gear S2 owners will be able to use their smartwatch with an iOS device as well by first installing an app on that device which will allow them to set up and customize the Gear S2 for use. They will reportedly be able to use all of the features available to Android users, however for additional features like Samsung Pay users will be required to use the smartwatch with a Samsung smartphone. Samsung itself has not yet confirmed if and when iOS support will arrive for the Gear S2 but it hasn't ruled out the possibility as well, so it just might happen.