Bluetooth LE device could be found by android device, but not iphone, why?

[shalongbasi1]

I hava a BLE device which can be found by andrioid 4.4 and 6.0 smartphone, but cannot be found by apple iphone5s iOS 9.3, what could be possible wrong with it?

[Petter Myhre]

Strange. Did you try LightBlue?

[Roger Clark]

BTW. LightBlue works on iPhone 4S, on iOS9 up to the point where you try to connect. It then gets an error