iOS: limit app to 64-bit devices only
In Xcode, set the following values:
Build settings > Architectures
- Set to arm64 only. (click Other -> + and than enter arm64)
Build settings > Valid architectures
- Set to arm64 only.
Info.plist
- Set UIRequiredDeviceCapabilities to arm64 only.
The app will then not be able to run on a device that does not support 64-bit code.