Android version of pMetro (http://pmetro.su). You can load ~200 metro maps of pMetro project from https://pmetro.github.io
Application builds the shortest route and calculates trip time using subway and other city transports. There is additional information on stations and 2D schemas (double tap to view).
Google Play: https://play.google.com/store/apps/details?id=com.utyf.pmetro
4PDA forum: http://4pda.ru/forum/index.php?showtopic=654059