They lied to get clicks, just like all the affiliate websites. The Samsung announcement only said it was coming out this month. That website lied and said it was coming out that day so people would click on their article.
Sleep tracking is still very broken, which they've acknowledged that they have received many reports about and are still working on. They would never hear the end of the complaints if they released the software like this.
My sleep function. Has not worked correctly since the beta install. Doesn't display the correct screens or collect sleep data. It does allow manual entry but lacks accuracy.
