Apple
Perhaps the biggest and most noticeable improvement to iOS 15, you can now FaceTime with your friends on Android and Windows devices.
This is an unusual move for Apple which prefers its walled-garden approach. However, the increasing competition from Zoom, Google Meet and Microsoft Teams might have forced the iPhone-maker to open up FaceTime to other platforms.
To be clear, you still cannot initiate a FaceTime call from an Android or Windows device – you will need an Apple device to do that. Still, it’s a notable improvement.