Terms of Use

Last updated: 10 September 2026

The short version

BreakerSonar asks you to stand at an open consumer unit and switch breakers off and on. That is live electrical equipment. If you are not confident doing it, or your panel is damaged, wet or unlabelled, stop and call an electrician.

Read “How to use it safely” below before you start. Following those rules is a condition of using the app, and damage that happens because they were not followed is not something we can be responsible for.

How to use it safely

These are the rules of use for this app. They are short because they are meant to be read.

Do not touch anything inside the panel. Operating a breaker switch from the front is all this app ever asks for — never remove a cover, never touch a busbar, never work on wiring.
Stop if the panel is wet, scorched, buzzing or hot, or if a breaker will not reset. Those are faults for an electrician, and none of them is what this app measures.
Know what is on the circuit before you switch it off. Medical equipment, a freezer, a desktop mid-write, an aquarium pump, someone else’s work — this app cuts power on purpose, repeatedly.
Put the outlet phone in a socket you can reach, not behind furniture or above head height, and never in a socket that is damaged or loose.
Use it only on a panel you are entitled to operate, in a building where you are entitled to cut power.

If any of these is not possible where you are, do not use the app that way. Nothing in it requires you to.

What the app does, and what it does not

It is not an electrical tester and not a safety device. It does not measure voltage, verify that a circuit is dead, or tell you a panel is safe. Never treat a mapping as proof that anything is isolated — test with a proper tester before any work.
It maps which breaker cut which outlet, and nothing more. It does not diagnose faults, sizing, bonding or anything else about the installation.
A label it produces is a record of what happened during your test, not a certification of the panel.

Your risk, and our responsibility

By running a mapping you accept the ordinary risk of switching your own circuits off and on: that something on them will lose power, and that anything unsaved or unattended on those circuits may be affected. That risk is yours, and it is why the rules above exist.

We are not liable for damage that results from not following the rules of use above. Nor are we liable for the cost of work you chose to have done, or equipment you chose to replace, on the strength of a result the app itself describes as an indication rather than a certainty.

Where we are liable, indirect and consequential loss is excluded and our liability is limited to the amount you paid for the app.

What these limits do not touch

Some liability cannot be limited by an agreement like this one, and this section does not attempt it. Nothing above limits or excludes liability for death or personal injury, for fraud or fraudulent misrepresentation, for intent or gross negligence, or any liability that the law of your country of residence does not permit to be excluded — including your rights as a consumer, and, in the European Union, liability under the Product Liability Directive, which expressly may not be excluded or limited by contract.

If any part of this section is held unenforceable where you live, the rest of it still applies and that part is read down to whatever the law does allow.

Paying for it

The purchase is made through the app store, not from us directly, so refunds are handled by the store under its own policy, and its terms apply to the transaction.

On iPhone and iPad the app is licensed to you under the App Store’s own standard licence terms, which apply alongside these; where the two differ about the licence to use the app itself, the store’s terms govern that licence. Apple does not provide the app and is not responsible for it — support is ours, at the address below.

Your data

Your panel map stays on your phones. There is no account, no server of ours and no cloud of ours at any point — the only copy that can leave a phone is your own device backup, into your own Google or Apple account. What the app handles and where it stays is set out in the Privacy Policy, which forms part of these terms.

Which law applies

The app is sold worldwide, so this section says what it can and does not pretend otherwise. If you are a consumer, you keep the protection of the mandatory law of the country you live in, including your rights against the seller of record in your own market, and nothing here takes that away or moves where you can bring a claim. Otherwise these terms are governed by the law of Israel.

Changes

If these terms change, the date at the top changes with them, and the updated text is published on this page before the release that relies on it.

Contact

BreakerSonar is made by Dmitrii Zusmanovich, an independent developer. Questions or complaints: [email protected].