I'm trying to find a cross-platform indoor wifi positioning solution. We have investigated Apple's CoreLocation. Apple has surveyed our site and we have a working prototype that works fairly well. However, Apple's solution is Apple only and not cross platform. Since roughly 50% of our users use Android phones, we need a solution that is cross platform.
Using Apple's indoor CoreLocation for Apple devices and Google's Geolocation for Android devices is not really feasible since we have over 2000 sites.
https://developers.google.com/maps/documentation/geolocation/
Google's Geolocation service WOULD be cross-platform if we had a way on iOS to get the access point MAC Address and signal strength. Unfortunately I see no AppStore approved method of doing this. Have I missed something in the Apple Apis?
I'm also open to alternative solutions. iBeacons would be cost prohibitive -- at least for version 1. Location sensing LED lights are out too.
You could check out IndoorAtlas (http://www.indooratlas.com) as their magnetic field based solution has SDKs for both iOS and Android and it is software only.