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Developer builds NewsNinja RSS reader to show each news story only once

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After repeatedly seeing the same story echoed across many outlets on his morning commute, a developer built NewsNinja, an RSS reader designed to group duplicate coverage. Version 1.0 was built in roughly ten days and reached the App Store on June 21, 2024, supporting iPhone, iPad, and Vision Pro. Its core features included grouping articles about the same event, opening pieces in reader mode, and AI-generated summaries as the sole paid feature. The developer first tried AI models to group headlines but found them slow and unreliable, so switched to fast string similarity algorithms that run on-device. The app then shipped frequent small updates, adding languages and features like OPML import in the months after launch.

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