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Reference.org
Clue (mobile app)
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<p>Clue is a menstrual health app developed by the <a href="/facts/Berlin/pMTIRNXK">Berlin</a>-based technology company BioWink GmbH. The app has over 15 million users from 180 countries. The startup has raised over $17 million from backers that include <a href="/facts/Union_Square_Ventures/T2p2KLcA">Union Square Ventures</a> and Mosaic Ventures. </p>