This question is regarding phone apps on Mobiles and Desktops. When I receive a call on my Mobile phone app "Answer" button is placed on right side of "Decline" button where as on my desktop same app "Answer" button is placed on left side of "Decline" button. Is there a specific UX reason for placing the answer button differently on Mobiles when compared to Desktops?
Most likely this is so to adhere with the platform guidelines.
Microsoft's guidelines are that the primary action is left-aligned.
Whereas Apple's guidelines are that the primary action should be right-aligned.
Asking Skype about this, their reply was:
As I have checked, there is no apparent reason for the different positioning of the answer button on the desktop application and the mobile application.
However, I have forwarded your query to my supervisor so she could post this question to the higher departments.
So I guess it's a TBC.