When designing Apps or web sites for mobile or tablet we have to consider if the layout will change when the alignment of the device changes. I believe this is a kind of responsiveness. Noticed that some apps simply restrict the layout not to change.

What's the pros and cons of changing the layout besides having to design 2 different versions every time for a feature.

Will the usability be different from landscape to portrait? How should the transition be, when switching between portrait and landscape.

When designing Apps or websites for mobile or tablet we have to consider if the layout will change when the alignment of the device changes. I believe this is a kind of responsiveness. Noticed that some apps simply restrict the layout not to change.

What's the pros and cons of changing the layout besides having to design 2 different versions every time for a feature?

Will the usability be different from landscape to portrait? How should the transition be, when switching between portrait and landscape.

When designing Apps or web sites for mobile or tablet we have to consider if the layout will change when the alignment of the device changes. I believe this is a kind of responsiveness. Noticed that some apps simply restrict the layout not to change. what's the pros and cons of changing the layout besides having to design 2 different versions every time for a feature. Will the usability be different from landscape to portrait. how should the transition be when switching between portrait and landscape

When designing Apps or web sites for mobile or tablet we have to consider if the layout will change when the alignment of the device changes. I believe this is a kind of responsiveness. Noticed that some apps simply restrict the layout not to change.

What's the pros and cons of changing the layout besides having to design 2 different versions every time for a feature. 

Will the usability be different from landscape to portrait? How should the transition be, when switching between portrait and landscape.