@Audaxjoe Same problem for me during fitness or surfing, the screen is not turning on as easily as I wish it should be. I think it’s a compromise on turning on too much or not enough. But as you said, it’s not a dealbreaker for me, it inherent to AMOLED on sport watch, not a suunto problem.

@Squirrel said in Why does Suunto only measure heart rate after midnight?: @Richard-Thygesen said in Why does Suunto only measure heart rate after midnight?: why does the heart rate measurement for sleep never is for the total sleep time Bug in iOS app. Already mentioned here: https://forum.suunto.com/topic/13678/sleep-tracking-hr-graph-issue Thanks!