Tools

Test line reader

Measure the intensity ratio between control (C) and test (T) lines on an OPK or pregnancy strip, enhance faint lines, and build a progression image. Photos are processed only in your browser — nothing is uploaded.

Select a photo of your test strip to begin.

Test progression

After measuring a test, add it here. Generate a composite image you can download — still only on this device.

How to use

Intensity measure. Upload a photo, drag to pan, scroll or use +/− to zoom, and rotate until the strip sits on the dashed centerline. Drag the green C guide onto the control line and the red T guide onto the test line, then tap Measure. The T/C ratio compares darkness at those two places.

Faint line detector. Switch modes and try the vertical or horizontal edge filter to make a weak line easier to see. This does not change the kit’s official reading.

Your eyes still win. Always follow the manufacturer’s instructions. Do not schedule medical care, fertility treatment, or medication changes based on this tool. Log OPK results in Lua’s Trying to conceive mode if you want them next to your cycle.

Photos never leave your browser. This is not a medical device and not a substitute for reading the test with your own eyes or for clinical advice. Lighting, camera quality, and strip brand all affect the numbers.

One app for your cycle, contraception, fertility and pregnancy.

Private, flexible and designed to adapt with you.