Privacy & Terms
Effective October 1, 2026
Short version: your audio never leaves your phone, there are no accounts or ads, and WhichBeep is a helpful tool — not a safety device.
Privacy
- Your microphone
- WhichBeep asks for the microphone only after you tap to allow it. The sound is measured in your browser, moment to moment, and is never recorded, saved, or sent anywhere. Leaving the listening screen turns the microphone off.
- Your rooms and results
- The room names you pick and your results live in the page address on your device. WhichBeep keeps no copy. If you share a results link, the room names go with it.
- No accounts, no cookies, no ads
- There is nothing to sign up for. WhichBeep itself sets no cookies and stores nothing in your browser.
- Visit counts
- Vercel Web Analytics counts page visits without cookies, so we can see which guides people find useful. It records the page, not the room names or results in its address, and it does not follow you to other sites. Vercel hosts the site and, like any host, processes the technical details needed to deliver a page.
- Links to other sites
- The results page links to batteries on Amazon. As an Amazon Associate, WhichBeep earns from qualifying purchases. If you follow that link, or the tip jar, or a share button, that site's own privacy policy applies — Amazon, for example, may set cookies to credit the purchase.
- If you write to hello@whichbeep.com, your address is used only to reply.
- Children
- WhichBeep is not directed at children and collects no personal information from anyone.
Terms of use
- A helper, not a safety device
- WhichBeep is a free informational tool, provided as is. It does not replace your detectors, testing them, or the manufacturer's instructions.
- Measurements can be wrong
- Echoes, background noise, open doors and phone microphones all vary. Confirm the result at the detector itself before you replace anything.
- Your manual wins
- The guides follow manufacturer documentation, but your model's manual is the authority. If they disagree, follow the manual.
- Liability
- To the fullest extent the law allows, WhichBeep and its author are not liable for any loss or damage that comes from using the site or relying on what it says.
If an alarm is sounding continuously, or a carbon monoxide alarm is sounding at all, do not use this site: get everyone outside and call 911 from outside.
Changes and contact
If any of this changes, this page changes with it, and the date at the top moves. Questions go to hello@whichbeep.com. More about who runs WhichBeep is on the About page.