Navionics Maps Free Extra Quality «8K HD»

| App | Free Features | Limitations | |------|--------------|--------------| | (official) | Full, high‑quality U.S. vector/raster charts | No sonar overlays, no community data, clunky interface | | iNavX (free tier) | Basic NOAA charts | Ads, limited features, in‑app purchases | | Argo | Crowdsourced depth + basic charts | Smaller coverage, newer app | | C‑Map (demo) | Very limited preview | Similar to Navionics demo |