My APAC watch also got 5.5 yesterday. But I need factory reset to get the battery consumption back to normal. This is the first time VA3 functions properly without serious problems since I bought it half year ago. It has been released around a year, right? What a shame for a company to release immature beta products to us.
APAC is Asian-Pacific version. ROW is rest of the world version. APAC updates are usually different because of the different languages involved in that region.
Got 5.50 and so far I definitely see a improvement in battery.. i didn't reset but just powered off and powered on.. will keep updated if I encounter some issues.. for stairs I feel it's improved but the version before 5.40 was best (although it's just a day with 5.50, will recheck stairs again)...