The Mercè 2022 app has all the information you need about this yea's entertainment programme.
When you open the app, it shows some of the programme's highlights, but you can search for any festival activity if you filter by type, venue and time slot. You can search using key words, and by the different programme categories. Wha's more you can see a list of artists classified by category, and a list of all the venues with activities.
During the festival, you can also do a search using the "here and now" option, which tells you the events that are on nearest to you. Collective searches are possible too, for Barcelona Acció Musical Festival (BAM) concerts and Mercè Arts de Carrer Festival (MAC) activities.