Keep a tempo with the tap tempo and metronome, or find out why a domain’s email bounces or lands in spam. Each tool does one job, runs on your device where it can, and shows its working.
Free. No ads, no paid extras, no tracking, no sign-up.
Made by measurement geeks, for anyone with a small job to do.
| Tool | What it’s for | Shows | Runs on | Status |
|---|---|---|---|---|
| Tap tempo & metronome | Find the tempo of a song by tapping, then keep it with a steady click | BPM, ±ms steadiness | your device | Ready |
| Mail check | Why your mail bounces or lands in spam: your domain’s email settings, checked in plain words | verdicts, with the records | our server | Ready |
Next: a tuner. Ideas we’re weighing: a stopwatch with laps, a reaction-time test, a refresh-rate test. Missing a tool? Tell us at contact@zmcontract.com.
We like to measure things. We wanted tools that just do the job, with the numbers shown and no strings attached, so we built them.
They cost us little to run, and they show the kind of work we do.
Go ahead. It’s free, there’s nothing to sign up for, and nothing follows you around afterwards.
Tell us what you’d like to measure or check: contact@zmcontract.com. It might be the next tool.
No cookies, no analytics, no third-party requests: fonts and everything else are served from this site. Our server counts requests (which page, when, and whether it worked) so we can see which tools are used. For security and to fix errors, it also keeps a full access log, including IP addresses, which is deleted automatically after 7 days. The Mail check does not record the domain you type. Zero Mile Contract Limited is responsible for this data. Full privacy notice