Do you want to become pregnant or simply better understand what is happening in your body? The Ava 2.0 cycle tracker is worn at night while you sleep and measures 9 parameters to monitor your body's activities. Every morning, the bracelet syncs with the app on your smartphone, allowing you to see your 5 fertile days of the cycle. Compatible with iOS and Android. Sweat-proof and splash-resistant. 12 hours of battery life.