How to check light levels in lux from your Wear OS watch

01Why the usual way fails

Most light meter apps are built for phones, so you have to take the phone out, hold it in the right position and keep the camera or sensor pointing the right way. Phone sensors sit in different places on different models, which makes the readings hard to compare. Professional meters give precise numbers but cost money and need to be carried around. For quick everyday checks, the usual tools are either too fiddly or too much. Guessing by eye is even less reliable, because the eye adjusts to bright and dim rooms within seconds. Two spots that look the same to you can differ a lot in measured light, which is why plants struggle in a corner that seemed bright, or a video looks dark on playback.

02How WristLux helps

WristLux is a light meter that runs on the watch itself. It reads the watch's ambient light sensor and shows a live lux value, and you can switch to foot-candles if you prefer. You can hold a reading while the live meter keeps running, which makes it easy to compare two spots. It also keeps session statistics and puts your latest reading on a Tile.

03Step by step

1. Open WristLux on your Wear OS watch.
2. Point the watch face toward the light you want to measure.
3. Pick a practical mode, for example desk, reading or plant, to compare the reading with that use.
4. Hold the reading when you find a spot you want to remember.
5. Check the session min, max and average before you decide where to place things.

04Tips

• Measure at the height that matters. For a plant, hold the watch where the leaves are, not at the window. For a desk, measure at the keyboard, not at the ceiling lamp.
• Use a session when light changes during the day. The minimum and average tell you more about a spot than one reading taken at noon.
• Treat the number as a reference. The app itself says it is a quick light reference and not a certified professional meter, so use it for comparing spots rather than for lab work.
• Add the Tile to check your last saved reading at a glance. The Tile and complication do not poll the sensor in the background, so open the app when you need a fresh value.

05Questions