Clue Raises $7 Million To Accelerate Growth Of Its Fertility Tracker App

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Berlin-based fertility app developer Clue has closed a $7 million Series A investment round led by Union Square Ventures and Mosaic Ventures, both of which are new investors for Clue. The new funding brings Clue’s total raised to $10 million since its 2013 formation. Clue’s earlier investors include TigerLabs, Luminary Labs, and Paris-based VC Groupe Arenault, though none of its early investors returned to lead its Series A. Clue also has a significant number of angel investors, having closed five seed rounds during 2013 and 2014, ultimately raising $3 million through those early rounds, including a $2 million seed round it closed this past March.

With the vast majority of its funds coming within the last year, Clue has done an excellent job building a technically well-rounded platform without spending a fortune. Thus far, the Clue app has been coded for iOS, Apple Watch, and Android. It integrates with Apple’s HealthKit, and supports 10 languages. Above and beyond its respectable technical underpinnings, the company is generating real traction, with two million active users spread across 180 countries. Clue built the majority of this infrastructure and consumer traction on just $1.3 million in early seed funding.

It should come as no surprise when startups with the technical maturity and consumer traction that Clue has close massive early rounds. Clue is also targeting a notably engaged end user. A 2014 TechCrunch report found that startups focused on women’s health apps had some of the highest levels of engagement seen across the digital health industry. The downside to high user engagement, however, is the competition it attracts. Women’s health has also been one of the most highly funded segments in digital health, with segment leader Glow closing a $17 million Series B in October 2014, and Ovuline pushing its total funding past $5 million with its May 2015 venture round.

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Unlike many period trackers, Clue was not designed specifically with fertility in mind. The app forecasts periods, highlights which days users are most likely to get pregnant, and which days they are likely to experience PMS symptoms. Also unlike many women’s health startups working in digital health, Clue is run by a female founder. Ida Tin, the co-founder and CEO of Clue is a Danish entrepreneur who led motorcycle tours and wrote a bestseller memoir about that experience prior to launching Clue.


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