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OnTheClock alternatives · Time Tracking

Open-source alternatives to OnTheClock

OnTheClock is not described as open source on its own site. 10 of the 98 other time tracking apps in this directory are open source, according to their own sites.

OnTheClock is a paid product with a free trial, starting at $4 per employee / month plus a $5 monthly base fee, billed monthly. 9 of them are free or have a free plan.

10 tools · Listings checked up to Nov 13, 2026 · Where the facts come from

How each one differs from OnTheClock

  1. TimeTrex

    Time and attendance, payroll and HR workforce management

    • TimeTrex starts at $5 per employee / month, $50 monthly minimum, 1-year term. OnTheClock starts at $4 per employee / month plus a $5 monthly base fee, billed monthly.
    • Only OnTheClock lists Windows, macOS, iOS and Android apps.
    • TimeTrex is open source, according to its own site.
    • TimeTrex also covers employee records.
    TimeTrex vs OnTheClockTimeTrex pricing and details

  2. Kimai

    Open-source time tracking with invoicing, self-hosted or cloud

    • Kimai starts at €2.99 per user / month, billed annually (€3.99 billed monthly). OnTheClock starts at $4 per employee / month plus a $5 monthly base fee, billed monthly.
    • Kimai has a free plan. OnTheClock does not, though it has a free trial.
    • Only OnTheClock lists Windows, macOS, iOS and Android apps.
    • Kimai is open source and self-hostable, according to its own site.
    Kimai pricing and details

  3. solidtime

    Open-source time tracker for freelancers and teams

    • solidtime starts at €8 per user / month, billed annually; on-premise licenses from €49 / year. OnTheClock starts at $4 per employee / month plus a $5 monthly base fee, billed monthly.
    • solidtime has a free plan. OnTheClock does not, though it has a free trial.
    • Only solidtime lists a Linux app.
    • Only solidtime lists a browser extension.
    solidtime pricing and details

  4. TimeTagger

    Open-source time tracker built on tags and a timeline

    • TimeTagger starts at €3 per month, billed annually (€4 billed monthly). OnTheClock starts at $4 per employee / month plus a $5 monthly base fee, billed monthly.
    • TimeTagger has a free plan. OnTheClock does not, though it has a free trial.
    • Only OnTheClock lists Windows, macOS, iOS and Android apps.
    • TimeTagger is open source and self-hostable, according to its own site.
    TimeTagger pricing and details

  5. TimeScribe

    Free, open-source local time tracker for macOS and Windows

    • TimeScribe is free. OnTheClock starts at $4 per employee / month plus a $5 monthly base fee, billed monthly.
    • TimeScribe has a free plan. OnTheClock does not, though it has a free trial.
    • Only OnTheClock lists a web app.
    • Only OnTheClock lists iOS and Android apps.
    TimeScribe pricing and details

  6. Timewarrior

    Free, open-source time tracking from the command line

    • Timewarrior is free. OnTheClock starts at $4 per employee / month plus a $5 monthly base fee, billed monthly.
    • Timewarrior has a free plan. OnTheClock does not, though it has a free trial.
    • Only Timewarrior lists a Linux app.
    • Only OnTheClock lists a web app.
    Timewarrior pricing and details

  7. ActivityWatch

    Free, open-source automatic time tracker that keeps data local

    • ActivityWatch is free. OnTheClock starts at $4 per employee / month plus a $5 monthly base fee, billed monthly.
    • ActivityWatch has a free plan. OnTheClock does not, though it has a free trial.
    • Only ActivityWatch lists a Linux app.
    • Only ActivityWatch lists a browser extension.
    ActivityWatch pricing and details

  8. Simple Time Tracker

    Free, open-source activity time tracker for Android

    • Simple Time Tracker is free. OnTheClock starts at $4 per employee / month plus a $5 monthly base fee, billed monthly.
    • Simple Time Tracker has a free plan. OnTheClock does not, though it has a free trial.
    • Only OnTheClock lists a web app.
    • Only OnTheClock lists Windows, macOS and iOS apps.
    Simple Time Tracker pricing and details

  9. Traggo

    Self-hosted, tag-based time tracking with dashboards

    • Traggo is free. OnTheClock starts at $4 per employee / month plus a $5 monthly base fee, billed monthly.
    • Traggo has a free plan. OnTheClock does not, though it has a free trial.
    • Only OnTheClock lists Windows, macOS, iOS and Android apps.
    • Traggo is open source and self-hostable, according to its own site.
    Traggo pricing and details

  10. Dayflow

    Open-source Mac app that logs your workday automatically

    • Dayflow starts at $20 per month, billed monthly. OnTheClock starts at $4 per employee / month plus a $5 monthly base fee, billed monthly.
    • Dayflow has a free plan. OnTheClock does not, though it has a free trial.
    • Only OnTheClock lists a web app.
    • Only OnTheClock lists Windows, iOS and Android apps.
    Dayflow pricing and details

Common questions

Is there an open-source alternative to OnTheClock?

Yes. TimeTrex, Kimai, solidtime, TimeTagger, TimeScribe, Timewarrior, ActivityWatch, Simple Time Tracker and 2 more are open source, according to their own sites.

Is OnTheClock open source?

OnTheClock is not described as open source on its own site. The listing was checked on Nov 12, 2026 against the pages it cites.

Which of these time tracking apps are free?

Kimai, solidtime, TimeTagger, TimeScribe, Timewarrior, ActivityWatch, Simple Time Tracker, Traggo and 1 more are free or have a free plan.

When was this checked?

Each listing shows its own date. On this page they run from Oct 5, 2026 to Nov 13, 2026. Vendors change prices and plans without notice, so confirm on their site before you buy.

This page is built from the listings. A tool is here because its listing says so, and the order is how close each is to OnTheClock: the alternatives its listing names first, then the tools that share the most features with it.