Date picker click
I have just updated to iOS 10 and have my keyboard sounds set to off. However when I use the date picker in any App, it clicks as the selection is changed. No way to set it off individually so I think it's a bug.
iPhone 6s, iOS 10
I don't think that's a sound (from the speakers). I think it's using the same magnetic mechanism that it uses for taptic feedback to produce that little "click" feeling.