Here are the operating system and technical requirements for the latest release of Human Anatomy Atlas for iPhone/iPad.
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.
The following devices are supported:
1.75 GB (up to 2.9 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.