I built a festival tracker that matches lineups to your music library

Hi HN,I built this app because I was tired of manually checking festival lineups against my music library every summer. I wanted a way to instantly see which festivals had the highest 'match' density for my specific taste.Why I built this:I missed one of my favorite artists at a festival last year simply because I didn't recognize their name on a crowded poster. I realized that with Apple Music/Spotify APIs, this discovery process should be automated.Key Features:Library Matching: It scans your library and ranks upcoming festivals by how many artists you actually follow.Apple Sync: Seamlessly imports your top artists and creates custom schedules.Offline-First: Since festival cell service is notoriously terrible, I focused on a robust local caching system so your schedule and maps work without a signal.Technical Details:Stack: React Native, MongoDB, AWS.Data: I built a custom aggregator that scrapes and normalizes lineup data from various sources to handle the 'entity resolution' problem (e.g., ensuring 'Artist A' is the same person across different posters).Privacy: All music library analysis is performed locally on-device where possible. I'd love to hear your thoughts on the UI or any technical questions about the matching logic. I’m also looking for feedback on how to improve the schedule-sharing feature for groups!How do you find concerts/music festivals that match your taste? How many festivals you join per year?Cheers!