You've killed plants by guessing. Everyone has. A soil sensor doesn't change the plant. It changes the guessing. It sits in the pot and tracks three things: moisture, light, and temperature. Here's what each reading is actually telling you, and what to do about it.
Moisture: the one that matters most
Moisture is the reading to check first, because watering mistakes cause more dead houseplants than anything else. When the soil reads dry through the root zone, water thoroughly, enough that water runs out of the drainage holes, then let it drain. When the soil still reads wet days after watering, hold off: constantly soggy soil starves roots of air and invites rot. The sensor's job is to replace the finger test with a number you can watch move.
One honest caveat: "dry" doesn't mean the same thing for every plant. A cactus wants to dry out; a fern does not. Use the reading together with what your plant actually likes, not as a single rule for the whole shelf.
Light: bright, but what kind of bright?
Most common houseplants do best in bright, indirect light. Near a window, but out of harsh midday sun.. If your sensor reports low light day after day and the plant is stretching toward the window or growing slowly, it's telling you the spot is too dim. Move it closer to the light, or accept that the corner needs a different plant.
Temperature: the quiet one
Most common houseplants are happiest roughly between 60 and 80 degrees Fahrenheit. A sensor that reports a cold draft by a window in winter, or a hot blast above a radiator, explains a lot of mysterious drooping. Move the plant, not the thermostat.
Putting it together
Check the readings when something looks off, not just on a schedule. Drooping plus dry soil means water. Drooping plus wet soil means stop watering and check drainage. Pale, stretched growth plus low light means move it. The readings don't replace looking at your plant. They explain what you're seeing.
That's what Soil Sense is for: two WiFi sensors that track moisture, light, and temperature and tell your phone when something needs attention, so the guesswork stops. Bloom wherever you are, starting with knowing what's actually going on in the pot.