Citymapper — Istanbul Multi-Modal Routing

Citymapper is the global gold-standard public-transport routing app, with comprehensive Istanbul coverage — every metro line, bus route, ferry, sea bus, funicular, and tram.

Unlike basic map apps, Citymapper compares all transport modes side-by-side: "Bus vs Metro vs Walk vs Bike vs Taxi" with trip durations, costs, and step-by-step navigation. Particularly useful for tourists visiting Istanbul who don't speak Turkish — the app is fully translated.