I love music festivals, but haven't decided which ones to go to this year. The lineup plays a big part in my choice. It's sometimes a headache having to go onto each music festival website and navigating through their quirky graphics to find the lineups for each day.
An excellent imrpovement to your app would be a festival tracker
You select the festivals that you want to follow, just like artists. Whenever they release any lineup, you get an optional notification to your phone.
You can select that festival and see which artists are playing via your app - with options to how you want that list of artists organised (day by day, stage and even split times nearer to the event, would be useful)
This will give the value of having all the festivals a user is interested in on one app in an easy to browse format and make it simple to see lineup updates.
I think an update like this will bring a new wave of customers to your app and could lead to them going to more gigs as they explore your app, meaning more money for artists, which i'm sure may translate to more profit for you guys.
Thanks for your great, free to use app.