FertilCalc: Ovulation Calc
Ovulation calculator, fertile window, period predictor and due date tool
About this app
Understand your cycle, plan with confidence.
FertilCalc turns your cycle dates into a clear colour-coded calendar: period days, fertile window, estimated ovulation and your next expected period.
KEY FEATURES
• Fertile window and ovulation estimate from your last period and cycle length
• Next period prediction that improves as you log more cycles
• Due date calculator from last period or conception date
• Interactive monthly calendar with a clear legend
• Cycle logging with automatic average from your recent cycles
• Trying-to-conceive mode with fertile window checklist and reminders
• Educational articles on cycle basics and when to see a doctor
• Optional PIN lock
• Works completely offline
YOUR DATA STAYS YOURS
Cycle data is among the most sensitive information there is. FertilCalc keeps 100% of it on your device, with no account and no cloud sync. Ever.
IMPORTANT
Calendar-based estimates are approximations, not a contraceptive method and not a guarantee of conception. Consult a healthcare professional for personal advice.