I built a movie ranking app using ELO algorithm — here's what I learned about SwiftUI

Short summary

The author built Montir, an iOS movie ranking app using the ELO algorithm for pairwise comparisons instead of star ratings. ELO lets users answer "Is Parasite better than Interstellar?" rather than assigning arbitrary scores, producing accurate ranked lists in 20-30 matchups. The post covers Swift/SwiftUI implementation, an intelligent matchup algorithm that improved convergence by 40%, and lessons on onboarding and SwiftData.

• •ELO algorithm enables pairwise movie comparisons instead of absolute star ratings
• •Intelligent matchup selection improved ranking convergence by 40% vs. random selection
• •Key implementation challenges: onboarding flows, convergence timing, SwiftData stability

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