Advanced Fertility Monitor

Clearblue's Advanced Fertility Monitor works differently from a prediction app or a single-hormone ovulation test: it reads urine test sticks each morning and tracks the rise and fall of both oestrogen and luteinising hormone (LH) across the cycle, then uses that hormone data — not calendar averages — to flag "High" and "Peak" fertility days. Because it is reading actual hormone levels rather than predicting from past cycle length, it tends to catch a wider fertility window than LH-only ovulation tests, which typically only flag the day or two right before ovulation.

Against Mira Plus, also in this category, the comparison is really about depth versus simplicity. Mira reads exact hormone concentrations via a connected reader and app, giving you a numeric trend line you can inspect, which suits people who want to see the data itself. Clearblue's monitor gives you a simpler High/Peak readout on its own screen with no app or phone required, which is easier for a quick daily check but tells you less about the underlying numbers. Against the Femometer basal thermometer, Clearblue is forward-looking (hormone rise before ovulation) rather than confirmatory (temperature shift after ovulation has happened), so the two measure different things and some people use both.

This suits couples who want more fertile days flagged than a basic LH-only test gives them, and who would rather not deal with a smartphone app or connected reader — everything happens on the monitor itself. It stores a six-cycle summary, so patterns become visible over a few months rather than resetting each cycle. It's a reasonable middle ground for anyone who tried a cheap ovulation strip and found the surge window felt too narrow to catch reliably.

The running cost is the real trade-off: the monitor itself is a one-off purchase, but the test sticks are not cheap and you need roughly 10 sticks a cycle during the fertile window, so a refill pack every month or two adds up over several cycles of trying. It also needs consistent first-morning urine testing to work well, which is more of a daily commitment than a single test on the day you predict ovulation.