Can the Accuware Indoors iOS SDK be compiled on 32 and 64 bit iOS devices?

Yes it can. Anyway keep in mind that your custom App compiled with the Accuware Indoors SDK, will not be able to obtain the indoor positions in indoorsIBeaconMode = NLLocationIBeaconIgnore on 64 bit devices (iPhone 6, iPhone 5S, iPad air, iPad mini retina), if it doesn’t contain ARM64 as target architecture. So, make sure to select Standard architectures (armv7, arm64) in “Build Settings/Architectures” (XCode 6).