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One person reads this inbox. Expect a reply within a few days, and a shorter one if your message is short.
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Suggest a tool
Genuinely useful. Suggestions are where the next wave of tools comes from, and a specific request beats a general one. Tell us what you were trying to do, what you tried instead, and what went wrong with it. "A unit converter that handles volume-to-weight for baking ingredients" is actionable in a way that "more converters" is not.
Report a bug
Include four things and the fix is usually quick: which tool, your browser and version, your operating system or phone model, and what you expected to happen against what actually did. If a sensor tool is not reading anything, mention whether the browser asked you for permission at all — that single detail separates two completely different faults.
Embeds and licensing
Several tools can be embedded in your own pages with an iframe, free, with a small attribution link back. If you write about tipping, guitar tuning, noise levels, unit conversion or accessibility, that is probably worth doing. Ask and we will send the snippet.
Business and press
Same address. Put "press" in the subject line and it gets read sooner. We do not accept paid guest posts, paid links, or sponsored tool placements, so those messages will not get a reply.