Smoke & carbon monoxide detector finder
We'll tell you which one it actually is.
You've been guessing: kitchen, hallway, kitchen. We'll tell you which one it actually is.Your phone's mic doesn't tilt its head. It just measures.
No app. No sign-up. Nothing leaves your phone.
How it works
- 1Name your locations — bedroom, hallway, kitchen.
- 2Walk to each one. Wait for the chirp.
- 3We rank them by volume and name the culprit.
Why are smoke and CO detector chirps so hard to find?
Smoke and CO detectors chirp at 2,500–4,500 Hz — a frequency your ears literally can't locate. The sound bounces off walls, ceilings, anything hard. That's why you're standing in the hallway at 2 AM tilting your head.
You're not imagining it. Your phone's mic doesn't tilt its head. It just measures.
What do the chirp patterns mean?
| 1 chirp / 30–60s | Low battery. Replace it. |
| 3 chirps | End-of-life warning. Replace the detector. |
| 5 chirps | Sealed 10-year unit is done. Replace the detector. |
| Continuous | Real alarm. Check for smoke or CO now. |
CO emergency: A CO detector that beeps 4 times, pauses, and repeats is signaling carbon monoxide — not a low battery. Open windows, get everyone outside, call 911.