Menstrual health startup Joii is launching the world’s first AI-powered app that measures period blood volume in the UK.

Joii’s innovation, which is registered as a Class I medical device in the UK, is bringing data to an area of women’s health that has long been ignored and minimised.

Using AI technology paired with Joii’s specially designed pads, Joii’s Period Evaluation app instantly measures blood volume and clot size with clinical precision. Users simply scan their pad with their phone.

Using the app to measure period volume provides users with objective data rather than relying on subjective terms like ‘heavy’, ‘light’ or ‘normal’ flow or counting how many pads or tampons they use, the startup says.

The app also provides cycle tracking and predictions, doctor visit notes so users can remember what to ask at appointments, educational content and personalised health insights and reports.