Enllaç is an application that helps you find the the best route using Barcelona public transportation.
All the principle modes of public transportation offered in Barcelona are covered:
Enllaç uses TMB's "I Want to Go" service to recommend possible routes using anything from the metro, to buses, trains and Cercanies (suburban commuter trains). At first glance the detailed interface shows you the trip duration, what time you will arrive, and which route is best to take. Using the iBus service, Enllaç lets you know with precision when and how frequent the next bus will arrive so that you know what time you should head for the stop.
For Bicing, Enllac shows you the availability of bikes and empty spaces for the Bicing stations nearest your starting point and your final destination in order of proximity.
You can also input a route and get a cost estimate with the correct tariff for the time of day and any possible additional costs. Its just an estimate, but at least it will give you an idea if you need to take out cash before hailing a cab. Incase the cab driver asks you for which route you want to take, using Google Maps, Enllaç finds the shortest way.
You can get just about anywhere by foot in Barcelona. So, in case you want to walk Enllaç gives you the shortest route and an estimate of the time it takes and the calories you'll burn to get there. Remember, walking 30 minutes a day improves your quality of life!