Developer rebuilds football prediction app after league season exposed four core product flaws

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A developer who built a football prediction game for the 2026 World Cup discovered that reusing the same app for France's Ligue 1 season broke nearly every product assumption. Over a 34-matchday, 306-match season, features like standings, match listings, and reminder emails — designed for a four-week tournament — became confusing or irrelevant. Key fixes included adding per-matchday leaderboards, capping the match dashboard to the next two matchdays, and splitting the reminder system into separate logic paths for tournaments versus leagues. No algorithmic overhauls were needed; the issues stemmed from mismatched cadence assumptions rather than technical bugs. The rebuilt app, a free prediction game with no betting, is available at pronoarena.com ahead of Ligue 1's August 21 season opener.

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