Public Transit Real-Time Arrival Tracker

Commuters want a quick way to see which nearby transit stations have trains arriving soon without opening multiple apps. This tool uses location data and transit APIs to show platform arrivals for nearby stations on a simple, fast interface. Target users are daily commuters in cities with public transit systems.

Google Maps and Apple Maps already surface real-time transit arrivals natively, and Transit App has dominated the dedicated transit category for over a decade with deep API integrations and a loyal commuter base. The space isn't growing in a meaningful new direction — there's no fresh API unlock or behavioral shift that makes this a better time to build than five years ago. At $300–1k/month, the revenue ceiling reflects the reality that commuters expect transit tools to be free, so monetization likely depends on ads or a thin premium tier, neither of which scales well with the engineering overhead of maintaining real-time data feeds across multiple city APIs. The most likely failure mode is simply irrelevance — a user opens it once, finds it slightly better than nothing, then defaults back to whatever's already on their home screen.