I was at the St. Paul ice fishing show 2 years ago and it was coming soon then! They must have one person working on it as I can’t see why any app would take so long.
I walked a mile and a half across a lake last weekend to fish a spot the Navionics app showed a sunken point with a beautiful looking inside turn in the depth range I was targetting, just to find a straight-line shore with no sunken point and no fish! The maps for this area leave something to be desired.