S2 Industries LLC is a software studio focused on building thoughtful mobile apps and digital products. Based in the US, we design, develop, and ship applications for iOS and the web.
iOS · Web
TrainTracker is the railfan community's train sighting map. Log the trains you spot, see what others have found, and explore sightings across North America in real time.
Capture locomotive number, railroad, train symbol, direction, GPS location, and photos.
Browse an interactive map with color-coded pins by railroad and filter by time, railroad, and more.
View nearby sightings, like posts from the community, earn badges, and build your sighting history.
S2 Industries LLC is a software development company specializing in mobile and web applications. We focus on building clean, reliable products that serve real communities. Our team handles the full product lifecycle — from concept and design through development, launch, and ongoing support.