Responsive card


I am currently doing my application is I encounter a problem with the responsive … Indeed I would like my card to take the whole page as on the screen of the iphone 4 but I can not, on iphone 6 for example there is a huge space and all laptops are different … how to make it take all the page all the time?

Thank you…

Iphone 4 :

Iphone 6 Plus :