Apple products need to have the ARM64 chip.

A helpful link to determine if you your Apple device is compatible: link: https://blakespot.com/ios_device_specifications_grid.html

Software: 

Requires iOS 12.0 or later, but ability to update to the latest version of the APP.

Compatible with: 

• iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPhone 8, iPhone 8 Plus, iPhone X, iPhone XS, iPhone XS Max, iPhone XR, iPhone 11, iPhone 11 Pro, iPhone 11 Pro Max and later models
• iPad (5th generation), iPad Wi-Fi + Cellular (5th generation),
• iPad (6th generation), iPad Wi-Fi + Cellular (6th generation),
• iPad Air, iPad Air Wi-Fi + Cellular,
• iPad Air 2, iPad Air 2 Wi-Fi + Cellular,
• iPad mini 2, iPad mini 2 Wi-Fi + Cellular,
• iPad mini 3, iPad mini 3 Wi-Fi + Cellular,
• iPad mini 4, iPad mini 4 Wi-Fi + Cellular,
• iPad Pro (9.7-inch), iPad Pro Wi-Fi + Cellular (9.7-inch),
• iPad Pro (10.5-inch), iPad Pro Wi‑Fi + Cellular (10.5-inch),
• iPad Pro (11-inch), iPad Pro Wi-Fi + Cellular (11-inch),
• iPad Pro (12.9-inch), iPad Pro Wi-Fi + Cellular (12.9-inch),
• iPad Pro (2nd generation 12.9-inch), iPad Pro Wi‑Fi + Cellular (2nd generation 12.9-inch),
• iPad Pro (3rd generation 12.9-inch), iPad Pro (3rd generation 12.9-inch), and
• iPod touch (6th generation).

Other Reference:

• One good simplified iOS device overview with less detail: iOS Device Summary
• Apple Document about this: iOS Device Compatibility Reference

Android: Requires Android 6.0 and up.