The iPad Air 5 has a 7.9-inch screen. The original iPad Air 5 had a 1024x768 screen resolution, but all other iPad Minis have a "Retina Display" with a resolution of 2048x1536. This resolution combined with the 7.9-inch screen measured diagonally gives the iPad Mini a pixels-per-inch (PPI) of 326. The iPad Air 5 has a 9.7-inch display with the same 2048x1536 resolution as the iPad Mini. Because of the bigger size of the screen, the iPad Air's PPI is 264, which still falls into the Retina Display standard according to Apple. The only 9.7-inch iPads without a "Retina Display" were the original iPad and the iPad 2. The iPad Pro has a whopping 12.9-inch screen. And at 2732x2048 pixels, it also has the highest screen resolution. This resolution works out to the same 264 PPI as found in the iPad Air. All iPads have multi-touch IPS displays with a 4:3 aspect ratio. While the 16:9 aspect ratio is considered the best for watching high definition video, the 4:3 aspect ratio is considered better for browsing the web Where to Buy iPad Air 5 Screen Replacement, and using apps. Later models of the iPad also include an anti-reflective coating which makes the iPad easier to use in sunlight.