Knowing the differences between screen size and screen resolution in mobile app development is an important detail you’ll need to be ready for when building an app for multiple devices.

First of all, screen size and screen resolution aren’t the same thing and shouldn’t be used interchangeably.

They each have their place in optimizing an app for various devices and screen sizes, like smartphones, tablets, smart TVs, and other screens.

When using a smartphone, you can see the screen size and the screen resolution.

The screen size is simply the physical size and measurement of the screen and screen resolution is the number of pixels on the screen.

For example, an iPhone 12 has a 6.1 inch screen size and a screen resolution of 2,532 x 1,170 pixels at 460 ppi.

Remember, devices with the same screen size can still have different resolutions.

The screen size takes into account things like the screen orientation, screen UI elements, like a navigation bar, and changes to the window configuration, like multi-window mode.

Whether you’re a designer, app developer, or entrepreneur, developing a mobile app that’s available for multiple devices will require knowledge on various design aspects, like screen size and resolution.

Familiarize yourself with all of the terminology involved and read the documentation given by the platform you’re developing for to ensure your app is set up for success.

In this video, we take a closer look at screen size vs screen resolution in mobile app development.
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