The Core app for iOS requires an iPad, iPhone or iPod Touch that meets the following requirements:
- 64-bit processor
- at least the minimum version of iOS listed on the iTunes App Store
For reference, a list of compatible iOS devices is included on the iTunes App Store page:
Due to Apple's end of support for iOS devices with 32-bit processors, older iOS devices or earlier versions of iOS cannot be supported. Refer to this article for additional background information.