Joii Night Evaluation Pads are organic cotton period pads. Paired with the Joii Ai-powered app they measure & evaluate period volume and clots. Helping to diagnose conditions such as fibroids, endometriosis, and heavy menstrual bleeding. Knowing your period volume can help with: Health monitoring. Identifying patterns and changes. Communicating with doctors. How does it work: Scan the QR code (attached) to download the Joii Period Evaluation App. Use the Evaluation Pads during your period. Measure your menstrual fluid loss with the Joii App.