LaunchSignal aggregates Product Hunt, Hacker News, and GitHub into one ranked feed

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A developer built LaunchSignal, a single dashboard that combines new product and repository launches from Product Hunt, Hacker News, and GitHub into one ranked list. Because the three platforms use incompatible scoring systems, the tool relies on a time-decay formula — score multiplied by exp(-hours/18) — to surface fresher, more active entries above older stagnant ones. The 18-hour half-life was chosen to ensure a recent Show HN post with real votes ranks higher than a brand-new empty repository. GitHub search queries were constrained to a short keyword list covering AI-related terms after longer queries returned errors. The public board does not personalize results, and a paid keyword alert tier is available at $9 per month, while the ranking itself carries no editorial curation or classification layer.

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