Joii, a new AI-powered app, measures period blood volume

Among the many period tracking apps like Flow and Natural Cycles, menstrual health startup Zoe is promising something new: measuring the amount of period blood with AI to diagnose conditions like endometriosis, and it launches today in the UK.

According to the UK’s National Health Service (NHS), one in three women experience heavy bleeding during menstruation, and it can be a symptom of the painful conditions endometriosis, fibroids and adenomyosis. Endometriosis can take four to 11 years to be diagnosed and 60 percent of cases go undiagnosed. Joi’s founder, Justyna Strzeszynska, developed the app after her own painful journey of fibroid diagnosis.

The Joy Period Evaluation app aims to track one’s cycle using AI and detect any potential problems and notify your doctor.

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To do this, users must purchase the Joy Evaluation Pad – it has day and night variations – and download the app (available on Apple and Android devices). When you want to see how much you’ve bled and whether there are any blood clots, hold your phone over the pad and scan using the app. According to a video on Joi’s website, the app will check whether you’re using a day or night pad, and detect if there are any clots.

joy app on screen


Credit: Joy

You can also use the app to track other symptoms like pelvic pain and fatigue.

“We already count our steps, monitor our sleep and track our heart rate,” Strzeszynska commented in a press release shared with Mashable. “Measuring blood loss is the next step in better understanding our bodies and demanding the care we deserve. We want every woman to have proof of that, not just the pain.”

In a five-month study with 72 participants, 88 percent said Joi would improve the way they communicate with their doctor about period volume, and more than half (52 percent) said their period health literacy improved after using the app.



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