Organic Maps and OsmAnd are not adding ads during navigation either. Nor "promoted pins". Nor ads when browsing the map. Nor tracking your every move.
Seriously, give them a try. And remember that, if the maps are lacking information, you are free (and encouraged) to improve them on OpenStreetMap.
Poor choice of colours: distinguishing between the orange of 2025 and the red of 2040 is very hard, especially considering most people will read this on a small phone screen.