Breaker Finder: BreakerSonar

Find out which breaker controls which outlet — without a helper, and without buying a tool.

Put an old phone in the outlet. Walk to the panel. Flip a breaker. The phone in the outlet screams the instant power drops, and the phone in your hand records which breaker did it. Repeat down the row. A full panel takes about ten minutes.

HOW IT WORKS
1. Pick roles. This phone stays with you at the panel; a second phone goes into the outlet you want to identify.
2. Pair them. Both phones on the same Wi-Fi, one four-digit code — or scan the QR.
3. Flip breakers. Every power loss is timestamped, sounded and logged. Name the outlet, and the breaker is labelled.

WHAT YOU GET
• A map of your panel: every breaker with the room and the outlet it feeds.
• A printable PDF legend sized for the panel door (A4 or Letter), plus a wallet card for the fuse box.
• Manual entries for circuits you identify by eye — lights, appliances, anything that does not need the second phone.
• Rename, re-map and correct anything later. The map is yours to edit.

WORKING ALONE WITH ONE PHONE
No second phone? Solo mode leaves your phone in the outlet with the siren on and a timestamped log. You hear it across the house, come back, and the app matches the log against the order you flipped the breakers in.

WHAT YOU NEED
• One phone and a charger. The charger is what senses the power; the phone stays awake with the app open for the length of the session.
• A second phone makes it live: both on the same Wi-Fi, and the phone in your hand names the breaker the moment the power drops. Any old Android phone works as the outlet phone.
• No Wi-Fi, or no second phone? Solo mode above needs neither.

PRIVACY
Your panel map stays on your phone — we never receive it. No account, no sign-up, no server of ours, no advertising. If your phone's own backup is on, the map goes to your Google account along with your other apps, and nowhere else. Crash reports can be switched off in Settings.

WHAT IT COSTS
Map as many breakers as you like. The first four labels are readable at no charge; unlocking the whole panel and PDF export is a single one-time purchase — there is no subscription. Restore takes one tap on a new device.

Languages: English, Russian, Spanish, Uzbek.

BreakerSonar senses power loss through the outlet phone's charger. It does not measure current, trace cables inside walls, or work on circuits without a usable outlet.