Item is not compatible with your phone.
This is Beacon Duck, beacon App for short Distance, normally within 100 m(300feet). Operating with Android Bluetooth, it detects all the Bluetooth devices within your Bluetooth range. while Most Bluetooth devices may be detectable, Androids older than Ver 2.3.5 will not be detected 300 sec after their being turned on. iphone shuts off Bluetooth when the screen turns out;not detectable.