Lose the tourist maps!
We used this app constantly in BCN (and Rome). The detailed offline maps and site information was very helpful.
It did not seem to have all of the restaurants or activities loaded, not sure if they promote some above others based on fees... Regardless, the maps were invaluable because they allowed us to set pins and loosely plan our day in advance.
Also liked the Wikipedia entries, they provided additional context.
If they could add bus routes (and times) it would be 6+ stars!
Becky Martin about
Barcelona Travel Guide and Map, v6.4