My fertile window Apple Health app: 30/7/24 - 4/8/24 Flo: 28/7/24 - 7/8/24 Premom: 31/7/24 - 5/8/24 OvuSense: 31/7/24 - ? They have provided me interesting insight but I wonder why Flo has the most fertile days compared to others 🙂