System Requirements – Visible Body

Here are the operating system and technical requirements for the latest release of Human Anatomy Atlas for iPhone/iPad.

Operating System	iOS 12.0 or later iPhone 5S, 6 and 6 plus, iPad Air 1, iPad mini 2, and iPad mini 3 require iOS 12.2 or later.
Processor	The following devices are supported: iPhone SE iPhone 5S or better iPad Air 1 or better iPad Mini 2 or better iPad Pro or better iPad (5th generation) For augmented reality features: Apple A9 processors or better. The following devices are supported: iPhone SE iPhone 6S or better iPad Pro or better iPad (5th generation)
Storage	1.6 GB (up to 2.8 GB with in-app purchases)
Network	No internet connection required after download and installation.

Unsure of what type of iPad or iPhone you have? Check Apple's iPad and iPhone listing.
iPad
https://support.apple.com/en-us/HT201471