Air-Go RTLE SDK will enable IOS and Android apps to develop indoor maps that will assist and guide visitors inside public and private indoor buildings.  Air-Go Real Time Location Engine running in every Smartphone can scale without limit due to the crowdsourced architecture. The smart devices measures each  WiFI or BLE beacon’s RSSI (Received Signal Strength Indication) from the positioning  infrastructure. The RSSI compared against the Positioning Database enable to estimate the actual position.