Is there a need to use @ 1x images if the application creates iPhone 4+ devices?

Question

I create my application only for iPhone 5, iPhone 6 and iPhone 6+. I received the information below: -

1- Normal device that matches 1 pixel = 1 dot @ 1x (older iPhone and iPad devices)

2- Retina device that expresses up to 4 pixels (2 x 2) = 1 point @ 2x (iPhone 4+)

3- Retina iPhone6 ​​and iPad, which correspond to 9 pixels (3 x 3) = 1 point @ 3x (iPhone6 ​​+)

Please clarify if there is a need to add @ 1x images to Images.xcassets ?

Answer 1

iPad 2 1x. 1x , iPad iPhone 4, . iPhone iPad, 1x. iOS 10 +, 1x-, iPad 2 iOS 10.