About the author

Ivo Buljeta — the engineer behind StopwatchHQ's tools and guides.

StopwatchHQ is built and maintained by me, Ivo Buljeta. I'm a software engineer with more than twenty years of experience building systems where accuracy and reliability aren't optional — most of it in pharmacovigilance and clinical research, where a wrong timestamp on a safety report is a regulatory problem, not just a bug.

Why a timing site

Timing precision is a genuinely interesting engineering problem. A browser stopwatch that loses two seconds an hour is fine for boiling an egg and useless for timing a presentation or a lab protocol. I started StopwatchHQ because the tools I wanted — accurate under real conditions, fast to load, free of clutter — didn't exist in one place, and the engineering behind them is the kind I enjoy: small, measured, testable.

How I build

• Measure first. The timers on this site are computed from the system clock and verified against real drift tests across browsers and devices, not against a demo that looks right once.
• Accuracy over animation. Timer displays update on animation frames, but the time itself never comes from counting frames — that's how background tabs break other sites' timers.
• Privacy by design. No accounts, no tracking of your timing data. What happens in your browser stays in your browser.
• Write what you test. The guides here include measured numbers — how much setInterval actually drifts, what tab throttling does to setTimeout, how alarm audio behaves on iOS. If I haven't tested it, the guide says so.

Elsewhere

You can find me on LinkedIn, where I write about engineering in regulated industries. For bug reports, feature ideas or questions about the tools, the contact page is the fastest way to reach me — every message gets read by the same person who wrote the code.