IrisA BBT and ovulation tracker
Log your morning temperature and LH test strips. Iris charts temperatures against a coverline and uses a positive LH test to mark ovulation and reset the countdown to your next period.
Basal body temperature
After ovulation, progesterone raises your resting temperature a little: Cleveland Clinic gives the rise as anywhere from 0.4 °F (0.22 °C) to 1 °F (0.56 °C) (Cleveland Clinic: basal body temperature). It is small, so take it as soon as you wake, at about the same time each morning. Iris charts each reading against a coverline so the rise after ovulation is easy to see.
LH tests
LH tests pick up the hormone surge that comes before ovulation. Log a positive test and Iris marks ovulation on the calendar and moves your period prediction to match, so a late ovulation shifts the forecast instead of making the period look late.
Works with Apple Health
Basal temperature and ovulation tests sync both ways with Apple Health, so readings from a connected thermometer or another app land in Iris without typing them twice.
Trying to conceive, or not
Pick a goal mode: trying to conceive, avoiding pregnancy, or just tracking. Colours and wording change to fit. Temperature alone is not reliable birth control (Cleveland Clinic: basal body temperature), and Iris never marks a day as safe.
Questions
Does Iris draw a coverline?
Yes. Temperatures are charted against a coverline so the post-ovulation rise stands out.
Can I log LH test strips?
Yes. A positive LH test marks ovulation on your calendar and resets the countdown to your next period.
Can I use temperature tracking as birth control?
No. Iris is not a contraceptive and its predictions are estimates.
Iris is not a contraceptive. Its predictions are estimates, and it never marks a day as safe.