Therefore, these devices have a varied amount of CPU as well as battery types. Mobile apps run on different devices equipped with very different hardware (systems on chip). Match the screen size to the above Dp value to get the PPI.Īn iPhone 6 device, which has a 4.7'' screen size, will result in 326 PPI. (calculate the device screen resolution square root -> for iPhone 6 it would be 750 x 1334) Here's the formula to calculate the Dp value: Or they will consume more CPU and battery to process the various app visuals on these devices.Īs a starting point, it is easy to determine your device's PPI and classify it as one of the density families accordingly. And it's also important to understand that screen size and resolution can change visuals.įor example, two Samsung devices with the same screen size but different resolutions might show different visuals to the user. It's important that you don't mix devices and operating systems based on the location of the devices. Source: (Perfecto's Device Coverage Index, Nov. XXXHDPI (extra extra extra high): ~640 dpiĪ Comparison of Mobile Screen Sizes, Resolution, and PPI.How Android Categorizes Mobile Screen DensityĪndroid categorizes mobile screen density into one of six families:
There are a variety of mobile screen sizes available. Introduction to Mobile Screen Size and Density These characteristics are important whether you are developing native apps, hybrid apps, or responsive web apps.
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