Companion Sonar works well for ice fishing

I have the FishHunter Directional 3D and it works well ice fishing.

Since the sonar is at the top of the hole, you do get interference for the top portion of the water. I was told it can be up to 4x the ice depth. The app has been updated so that you can adjust the sonar power and that reduces the interference. Being at the top of the hole also reduced the size of the "cone" that the sonar can see compared to a traditional ice fishing flasher. It is also cheaper and more portable.

With those limits in mind though, it does mark fish and has helped with finding the right depth and setting the bait at the right height.

Engibeer about FishHunter - Fish Finder/Sonar, v1.0.29