I'd install this BT call version and after a lot of time trying to connect to iPhone I just got the devices paired, and WiiWatch working.
It's a bit tricky. The only way to connect to iPhone is by settings>bluetooth and press THOR device listed to connect. If you go from smartwatch, the BT keep dcing.
After that, you must go for "Connect Phone" on your watch, install WiiWatch from QRCode at 1st screen, open the app on your iPhone, go to 3rd screen at your watch and click Search. It take about 20s to connect. When I try to connect via bluetooth icon, does not work.
Further tests on the way, but it seems to work pretty good.
Thanks to the huge help you do here, this is my 1st reply at the forum, and I want to apologize for my bad bad english.