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Dev.to
7/12/2026
The original title is: "Building 'Called It!': A Weekend Football Prediction App with Next.js and Supabase"

The original title is: "Building 'Called It!': A Weekend Football Prediction App with Next.js and Supabase"

Original: I Turned My Football Group Chat Arguments Into an Actual Scoreboard!

Short summary

A developer shares 'Called It!', a weekend-built football prediction platform that turns group-chat score predictions into a competitive scoreboard. Built with Next.js, Supabase, and the football-data.org API, it timestamps and auto-scores predictions against real match results. The author details architecture decisions favoring a single-app deployment and an idempotent scoring engine.

  • •Called It! is a social football prediction app built over a weekend
  • •Stack: Next.js App Router, Supabase, Tailwind, football-data.org API
  • •Scoring engine is 86 lines of TypeScript with confidence multipliers and idempotent reruns

Generated with AI, which can make mistakes.

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