An ovulation tracker that tells you the truth
Flowra estimates your fertile window from your own cycle history, basal body temperature, and cervical mucus signals, then shows it as an honest range. It is built for awareness and planning, not pressure, and never pretends to be more certain than your body is.
See your fertile window as a range, not a single day
Most ovulation calculators throw out one dramatic "ovulation day." Real bodies are not that precise. Flowra shows a fertile window with a clear start and end, and a confidence level based on how regular your recent cycles have been.
When you are trying to conceive, a realistic range helps you plan without turning every day into a deadline. When you are simply curious, it helps you understand your own rhythm.
Combine cycle history, temperature, and mucus
Flowra blends your logged cycle history with optional basal body temperature readings and cervical mucus notes. Each signal you add sharpens the estimate, but none of them are required to get started.
You can track passively from cycle dates alone, or add symptothermal signals when you want a tighter fertile window estimate.
Built for irregular cycles, not just textbook ones
If your cycles vary, a rigid "day 14" calculator can be misleading. Flowra widens the fertile window when timing is uncertain, explains why, and asks for more data instead of guessing.
For a deeper look, read our guides on how ovulation works and what irregular cycles can mean.
Fertility data that stays yours
Ovulation and fertility data is some of the most sensitive information there is. Flowra keeps it minimal, encrypted in transit, and under your control. Export it for a clinician, or delete it entirely whenever you want.
Read more about our approach to privacy.
Flowra's ovulation and fertile window estimates support awareness and planning. They are not contraception and do not replace medical advice. For contraception or fertility concerns, talk with a qualified clinician.
Track ovulation with calm clarity
Start with cycle dates, add signals when you want, and keep a private record you fully control.