Greenfish ... if you're asking if there's a depth finder unit that can send the screen info to your phone (via wi-fi or bluetooth), I haven't seen or heard of any.
But, as Eric has pointed out, there are several different setups that turn your phone into the screen of a depth finder ... but they require using the transducer of these different setups, and don't use your current depth finder units or transducers to send the info to your phone. There's the iBobber, Deeper SS, T-box, Lucky, Fish Hunter, & Wi-Fish ... but they're all units in their own right & have their own transducers, using wi-fi to send the signal to your phone screen, because they don't have screens of their own.