Time Roundup: Simple time tracking for freelancers

I built Time Roundup because I just needed to know how many hours I worked on each job. I was trying to pull a report from Toggl and had to click through popups for new features I don't need, then figure out where the report I wanted had moved in the latest UI redesign — just to get the same info I've always used. Toggl is a great product, but it's way more than I need. I'm a freelancer. I just need to: Track multiple jobs Start and stop a timer Round up the time entries See my totals Mark time as billed Export when I need to I looked at spreadsheets, but they were cumbersome. I looked at simpler apps, but they all wanted a monthly subscription and a cloud account. So I asked Claude if there was another option, and one of the suggestions was: build your own. Two hours later I had a working time tracker. A couple more hours dialing in the UI, and Time Roundup was done. It's a single HTML file. No account, no cloud, no subscription. You open it in your browser, click start, click stop. Your data stays on your computer. It does exactly what a freelancer needs and nothing more. Bookmark the file or create an alias for easy access. What it does: Start/stop timer with notes on each entry Smart rounding to customizable billing intervals (6 min, 15 min, etc.) Mark jobs complete, mark time as billed with invoice references Export time entries to CSV Backup and sync between your own devices My copywriter saw it on my screen and bought a copy on the spot. He said it was exactly what he'd been looking for, and he loves it. I'd love to hear from other freelancers — what does your time tracking setup look like right now, and what bugs you most about it?