Calculators and timers, no sign-up
Each tool runs in your browser with plain JavaScript. Nothing you type is uploaded, and the contraction timer keeps its log on your device only.
Ovulation calculator
Estimate your fertile window from your last period and cycle length.
For: Cycle, Trying
Due date calculator
Estimated due date from your last period, conception date or IVF transfer.
For: Waiting and testing, Early pregnancy, Growing
Online contraction timer
Tap start and stop. Duration, interval and hourly averages, saved in your browser.
For: Labor
Chinese gender chart
The traditional lunar-age chart, for fun only.
For: Early pregnancy, Growing
Coming next: an hCG-by-DPO reference, once we have a cited source table we are happy with.
One app for each step
From cycle tracking to the contraction timer, every Your Baby Journey app keeps your data on your device and stays out of the way.