Those models are theiPad, iPad Air, iPad Mini, and iPad Pro.
All the iPad models are available with either a Wi-Fi or Wi-Fi + Cellular configuration.
The Original iPad Air
The iPad Air was the first tablet powered by a 64-bit chip.

The iPad Air is roughly twice as fast as the iPad 4 that preceded it.
Typically, the iPad has mimicked the basic design and features of the same-generation iPhone.
The iPad Air 2 also includes Apple’sTouch ID fingerprint sensor.
The iPad Air 2 also improved the iPad’s camera to an 8 MP iSight camera.
iPad Air 3
Apple released the iPad Air 3 in 2019.
With its 10.5 inch diagonal screen, it is bigger than the 9.7-inch iPad Air 2.
It supports the1st generation Apple Penciland theSmart Keyboard, which gives it 2-in-1 functionality laptop users appreciate.
The 8 MP rear camera can captureLive Photos, but it’s limited to 1080p video recording.
iPad Air 4
The 4th generation iPad Air was released in 2020.
It includes an A14 bionic processor and supports the2nd generation Apple Pencil.
The 12 MP rear camera can record at 4K, while the front camera is 7 MP.
The only thing missing is a dedicated Home button, but the iPad Air still supports Touch ID.
It is integrated into the sleep/wake button.
The 5th generation iPad Air is capable of recording 4K video, slo-mo video, and playback zoom.
you could also use the back camera to scan documents and them mark them up with an Apple Pencil.
The iPad Air has Wi-Fi 6 for fast wireless connections.
The Wi-Fi + Cellular models have next-generation 5G capabilities.
Activities such as moving text around the screen and manipulating images is easier with more display real estate.
The price for the iPad Air starts at $100 more than the Mini.
Both are powerful tablets, but some people may not need the extra capacity of the Pro.
The latest models of the iPad Pro featureApple Face ID technologyfor unlocking the gadget.
They do not offer Touch ID.
iPad 9
The iPad is the least powerful of the four models.
That’s a big savings for users who don’t require the speed and power of a higher-end model.
It also supports the 1st generation Apple Pencil.