It's also a feature in Citymapper. Only front/middle/back but the integration means I use the information more often https://citymapper.com/news/726/where-to-g

It's also a feature in Citymapper. Only front/middle/back but the integration means I use the information more often https://citymapper.com/news/726/where-to-get-on-the-train https://citymapper.com/news/726/where-to-get-on-the-train