Mostly fishing out of the kayak these days and was looking at adding a fish finder but don't really want the hassle and weight of adding a power source. As I was looking through my options I came across the I-bobber. It is a transducer, that looks like a bobber, that you just throw out and then it transmits data back to your phone via bluetooth. Obviously it's nothing like a nice finder but it will give you depth, contour, water temp and fish signals. Has anyone ever used this, or something similar? Seen some youtube and google reviews but was hoping for some real world feedback from you guys.

Thanks