Semper Fishing is a free fishing guide to public waters across the United States, featuring more than 44,000 fishing spots in all 50 states. Its map and directory help anglers explore access points such as boat and canoe launches, docks, marinas, piers, bridges, shore access areas, state parks, and wildlife areas. Users can search by lake, river, or city and browse popular fishing states.

The platform also offers practical tools for planning and tracking fishing outings. Its AI-powered Trip Planner creates fishing game plans, while the Fish Identifier uses photos to help identify fish. Species guides cover seasonal activity, techniques, and state records for fish including bass, trout, walleye, pike, musky, panfish, and catfish. Anglers can look up regulations by water, species, and month, and log catches to track personal bests. A Run Tracker provides salmon and steelhead run information, with live reports and watchlist alerts available through the paid Pro Angler plan. Semper Fishing offers limited monthly access for free and states that it does not run advertisements.