https://play.google.com/store/apps/d....wi_fish&hl=en

https://play.google.com/store/apps/d...shfinder&hl=en

Does anyone use any of these type systems?

Anyone have the brainpower to wi-fi their fishfinder signal to a tablet or phone?

It make total sense to me but I see the price of a 3.5" fish finder is $129 and the 7" is $1299 and the 10" is $2,000 up.

if you can wi-fi the screen then you can hold it up close to see detail on a 10" tablet. For us blind old men this can be very useful. The raymarine system is only $199 then you just use your phone to see the bottom!