Tools
Free cycle tools
Simple tools that run in your browser. No account, nothing uploaded. Use them for a quick estimate — then track real signs in Lua when you want more than averages.
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Ovulation calculator
Estimate ovulation and your fertile window from your last period and cycle length.
Open calculator -
Pregnancy chances
See how per-cycle odds can add up over several cycles. Educational averages only.
Open calculator -
Test line reader
Measure OPK or pregnancy strip T/C intensity in your browser. Nothing uploaded.
Open reader
These tools give calendar estimates based on averages. They are not medical advice, not a fertility diagnosis, and not a method of contraception. Cycles vary. If you are trying to conceive or have concerns about your cycle, talk with your clinician.
One app for your cycle, contraception, fertility and pregnancy.
Private, flexible and designed to adapt with you.