Docs, guides and news · Clockflux
What is Clockflux?
Clockflux is a free work hours tracker for anyone who wants to know how much they really work. You check in when you start and check out when you stop; it adds up your days and weeks, keeps an overtime balance against your contract, and counts down your holiday allowance. It runs in your browser, installs like an app, and works offline.
No required sign-up.
Who is it for?
Employees with contracted hours who want to keep an eye on overtime, anyone on flexitime or time off in lieu, freelancers who need totals for a timesheet, and people who simply want to stop working late without noticing. It is a personal tracker: there is no manager view, and nobody else sees your hours.
What does it keep track of?
- Your hours: each day’s total and the week’s, in decimal hours or h:mm, against your weekly target. Tracking your hours
- Your month: a calendar of the days you worked and took off, where you can fix a forgotten check-out or mark a week of holiday at once. Calendar and days off
- Your holiday: the days you have earned, used and have left, prorated if you started mid-year. Holiday allowance
- Your balance: whether recent weeks are on track, under or over, and a running overtime total. Overtime and work/life balance
Does it need an account or a connection?
No. The free version keeps everything in your browser’s storage on your own device and never sends it anywhere, so it works with no internet connection. You can install it on a phone, tablet or computer, and keep a backup file in case you clear your browser. See offline use, installing and backups.
What does it cost?
Nothing. Tracking, the calendar, holiday allowance and the Health view are free with no time limit, and nothing free moves behind a paywall later.
Clockflux Pro
An optional subscription that adds:
- Cloud sync across every device you use Clockflux on
- Custom light and dark themes
- Holiday carryover into the new year
- CSV, PDF, and calendar (.ics) export
- Unlimited history, with nothing archived or trimmed
- A custom daily target instead of the default 8 hours
- Task tracking: hours per task, client or project
- AI assistants: ask Claude, Cursor or Codex about your hours, and check in from a chat
- A weekly summary email of your hours and overtime, every Sunday evening
Pro needs an account, so signing in and syncing means some of your data reaches our servers. See the privacy notice for exactly what. It renews until you cancel, you can cancel it yourself at any time from Settings, and you can delete your account (and everything we hold for you) from there too. See pricing and full terms, or everything Pro adds.
Who makes it?
Clockflux is built and run by David Lawrence, who also writes the guides and the blog. Read about Clockflux for why it exists and how it is funded, or see what is being built next on the work-in-progress page.
From the blog
- The confetti at 8 hours: how Clockflux celebrates your target
When you check out after reaching your daily or weekly target, Clockflux throws a little confetti. What sets it off, what doesn't, and why it never cheers for overtime.
- How to read the Health tab: status, overtime balance and recent weeks
What the Health tab's status, overtime chart and weekly breakdown really measure, with worked examples, and why it sometimes disagrees with how your week felt.
- Clockflux works offline: install it and back up your hours
Clockflux keeps working with no signal, and installs on your phone or computer. What that means for where your hours live, what can erase them, and how to back them up.
Read the blog for release notes and practical posts on your time, or follow along with the RSS feed.
Free tools and guides
Need a quick sum without installing anything? Convert hours and minutes with the decimal hours converter, turn start and finish times into hours with the time card calculator, add up a week with the overtime calculator, or work out part-time, starter or leaver holiday with the pro-rata holiday calculator.
New to tracking your time? Read how to track your work hours, how to calculate overtime, pro-rata holiday allowance explained and time off in lieu and flexitime, browse the docs, or see the FAQ.