If I measure distance from beacon I get quite different results if I compare iOS build in vs Android using Estimote SDK.
For example if Beacon is 10 meters away on iPhone I see 10m and samples using Estimote SDK shows 5 meters.
We already talked via email. But I'll write also for the community.
Apple has implemented basic noise reduction algorithms into its Core Location framework, on top of which iBeacon standard is built. This allows for much more accurate RSSI readings. You can read more about it here: