They mentioned the low-end model requiring an iPhone, but unless I missed something due to the sporadic live-stream, they seemed to trail-off when it came to wh

They mentioned the low-end model requiring an iPhone, but unless I missed something due to the sporadic live-stream, they seemed to trail-off when it came to what the other two models would be like. I could see GPS being something built in to the higher-end model for instance.