Toggl Track is the time tracking standard for freelance developers and has been for over a decade — for good reason. The free plan for individuals is genuinely complete: unlimited projects, unlimited clients, unlimited time entries, weekly reports, a browser extension that adds a Toggl timer button to almost every web application (GitHub, Trello, Notion, Gmail, your own apps), a desktop app for Mac and Windows, and iOS and Android mobile apps. The paid Starter plan at $9/month per user adds billable rate tracking, exportable reports, and round-up rounding rules — features most freelancers need eventually.

The Toggl browser extension is the feature that makes it actually work in practice. When you open a GitHub issue to start working on a feature, the Toggl button appears in the issue — click it to start a timer pre-labelled with the issue title and linked to the relevant project. When you switch to a new tab or close the GitHub issue, the timer reminds you to stop or continue tracking. This eliminates the main failure mode of time tracking: forgetting to start or stop the timer during context switches.

For PHP developers working on multiple client projects simultaneously, Toggl’s project and client organisation is particularly clean. Each client has their own colour-coded folder. Each project within that client has its own colour. The weekly and monthly reports break down your billable hours by client and project automatically, generating the data you need to create accurate invoices without manually calculating time from a spreadsheet.

Clockify is the most generous free time tracking tool available in 2026. The free plan includes unlimited users, unlimited projects, unlimited time entries, basic reports, and time tracking across web, desktop, and mobile — with no artificial limits designed to push you toward paid plans. For freelance developers who want a professional time tracking tool at zero cost, Clockify is the answer.

The Clockify interface is slightly less polished than Toggl’s but fully functional. The project and task hierarchy (Client, Project, Task) maps naturally to how freelance development work is organised. The time sheet view is particularly useful for week-by-week review — it shows all entries in a spreadsheet-like grid that makes it easy to spot gaps where time was not tracked. The browser extension adds a Clockify timer button to common web tools including GitHub, Jira, Trello, Asana, and Google Docs.

The paid plans add features that growing freelancers eventually need: invoicing directly from Clockify (Basic plan $4.99/month), required field enforcement (Standard plan $6.99/month), GPS tracking and screenshots for remote teams (Pro plan), and advanced analytics. For a solo freelance developer, the free plan covers 90% of what you actually need.

Harvest is the time tracking tool that takes the work out of creating invoices. You track time against a project, mark entries as billable, and click “Create Invoice” — Harvest generates a professionally formatted invoice populated with all tracked hours, calculates the total at your hourly rate, and sends it to the client via email in one workflow. No exporting to spreadsheet, no manual hour calculation, no copy-pasting time entries. For freelance developers who bill hourly and create invoices at the end of each month, Harvest eliminates the tedious middle step that makes invoicing feel like work.

The free plan allows one seat and two active projects — sufficient for a developer with one or two active clients at a time. The $12/month paid plan removes all limits: unlimited seats, unlimited projects, and access to all invoicing and reporting features. Harvest also integrates with Stripe and PayPal for online payment, meaning clients can pay directly from the invoice email with a credit card — dramatically reducing the average invoice payment time compared to bank transfer requests.

RescueTime takes a fundamentally different approach to time tracking: rather than requiring you to start and stop a timer manually, it runs silently in the background and automatically tracks which applications and websites you use and for how long. Every minute spent in VS Code is logged as development time. Every minute on GitHub is logged as development time. Every minute on YouTube or Reddit is logged and categorised as a distraction if you have configured those sites accordingly. You see exactly where your time goes without any manual input.

For freelance PHP developers who struggle with the manual discipline of timer-based tracking, RescueTime solves the problem at its root. The free tier provides basic automatic tracking and a productivity score. The paid plan ($12/month) adds detailed reports by project (using Focus Sessions to tag chunks of work to specific clients), FocusTime mode that blocks distracting sites during deep work sessions, and goal tracking against weekly billable hour targets. The limitation: RescueTime tracks by application and website, not by specific task. You cannot see exactly how long you spent debugging a specific PHP function — only that you spent 2 hours in VS Code on Tuesday.

Timely uses AI to automatically create time log entries by analysing your calendar events, document activity, browser history, and application usage patterns. Instead of manually starting timers, you review AI-generated time entries at the end of the day — confirming, adjusting, or rejecting them in a review workflow that typically takes 5 to 10 minutes. For developers who consistently forget to start timers despite good intentions, Timely’s AI-first approach removes the fundamental friction point.

The memory feature tracks everything in the background without storing any content — only metadata about which applications and documents you used and when. This privacy-forward approach means Timely never sees your code, your emails, or your documents — only that you spent time in “VS Code” or “Outlook.” The $9/month Starter plan supports up to 5 users with unlimited projects and the AI memory feature included.