Fertility Tracker for Trying to Conceive
Track LH tests, BBT, cervical mucus, and conception probability - all in one private app. Everything TTC couples need to optimize their chances.
Track LH tests, BBT, cervical mucus, and conception probability - all in one private app. Everything TTC couples need to optimize their chances.
Eve Day combines multiple fertility signals to give you the most accurate picture of your fertile window. Our intelligent system weighs each signal appropriately to predict ovulation with confidence.
Log your LH (luteinizing hormone) test results daily. Eve Day tracks both positive and negative results, identifies your LH surge, and uses this data as the strongest indicator of imminent ovulation. Get reminders to test at optimal times during your fertile window.
Track your basal body temperature with our intuitive BBT chart. Eve Day automatically detects the thermal shift that confirms ovulation has occurred. Our system validates readings within the 96-99°F range and warns you if you measure too late in the morning for accuracy.
Monitor your cervical mucus changes throughout your cycle. Eve Day uses a 5-level classification system to track your fertility signs:
Even without other signals, Eve Day provides calendar-based ovulation estimates using your historical cycle data. This baseline is refined as you log more fertility signs.
Eve Day calculates your daily conception probability based on peer-reviewed research on fertility timing. Know exactly how likely conception is each day of your fertile window.
O-1 (day before ovulation): 41% - Highest probability
Ovulation day: 33%
O-2: 27%
O-3 to O-5: 14-16%
Day after ovulation: 5%
Outside fertile window: ~2%
Eve Day shows you how confident the prediction is based on how many fertility signals you're tracking. More signals = higher confidence in your fertile window prediction.
Your calendar clearly shows your fertile window with color-coded days. Green indicates peak fertility (ovulation day and day before), while yellow shows other fertile days. Plan intimacy accordingly to maximize your chances.
The two-week wait between ovulation and when you can test for pregnancy can feel endless. Eve Day helps you navigate this anxious time with dedicated support features.
Know exactly how many days past ovulation (DPO) you are. Eve Day counts down the days until you can reliably test for pregnancy.
Track your pregnancy test results - both positive and negative. See your testing history and know when it's most accurate to test based on your DPO.
Log potential early pregnancy symptoms during your 2WW. While symptoms can be similar to PMS, tracking them helps you notice patterns across cycles.
Eve Day helps identify potential implantation spotting that may occur 6-12 days after ovulation, distinguishing it from your regular period.
When you get that positive test, Eve Day seamlessly transitions to pregnancy tracking mode. Continue your health journey with features designed for expecting parents.
Calculate your due date using multiple methods:
See exactly how far along you are with automatic week and trimester calculation. Track your pregnancy progress from positive test to delivery.
Continue logging symptoms throughout your pregnancy:
Celebrate pregnancy milestones with trimester-based achievements and progress visualization. See your journey unfold week by week.
Fertility data is incredibly sensitive. Eve Day ensures complete privacy - your TTC journey, test results, and pregnancy status never leave your device.
Free fertility tracking with complete privacy.