Why there is no good long cable for the iphone 7 plus to connect with the controller? It allways to short or it's not compatable. Why they don't make this work for all iPhones?

Hi, please tell me the model of your drone. If you use spark, I would recommend you use wifi connection instead. OTG cable is not supported now. Thanks for your understanding.

It's an Spark indeed. But wifi is not stable enough. This means you can't use a Spark with iOS when wifi conditions are poor?