Cattr

Open-source self-hosted time tracker with screenshots and activity detection

About Cattr

Cattr is an open-source, self-hosted time tracking system with screenshot capture and activity detection for teams. The Community version is free forever under the SSPL license.

Cattr website preview

Live preview of cattr.app via the WordPress mShots service — it can take a few seconds to generate on a first visit.

Cattr: strengths & things to check

Strengths

Completely free to use — this directory lists no paid plan for it.
Covers time tracking, open source, self hosted, screenshots — see the focus areas listed in its key facts.
Has 6 close alternatives in the same category on this page, so switching or comparing is easy.

Things to check

Free tools can change their model or shut down — avoid locking critical work into it without an export path.
Current plan prices are not listed here (they change too often to print reliably) — confirm the exact price on the official site.
It is one of 2092 tools in the Productivity & Notes category here — compare it against the alternatives below before you commit.

Derived from this listing's own data (pricing model, focus areas and category) — not a hands-on review score.

Cattr pricing

Pricing model	Free — listed in this directory as a free tool, with no paid plan required to use it.
Free access	Yes — fully free
Current plan prices	Listed on the official site — prices change, so this directory links out instead of printing a number that may already be stale.
Official site	cattr.app

Cattr key facts

Category: Productivity & Notes
Pricing: Free — listed in this directory as a free tool, with no paid plan required to use it.
Focus areas: time tracking, open source, self hosted, screenshots
Official site: cattr.app

Cattr FAQ

How much does Cattr cost?

Free — listed in this directory as a free tool, with no paid plan required to use it. Current plans and prices are listed on the official site (cattr.app).

What is Cattr used for?

Open-source self-hosted time tracker with screenshots and activity detection Its focus areas in the Productivity & Notes category: time tracking, open source, self hosted, screenshots.

Where can I try Cattr?

On its official site, cattr.app — the Visit Official Site button above goes straight there.

Cattr vs alternatives

	Cattr	Alian Hub	TimeTracker	ActivityWatch
Pricing	Free — listed in this directory as a free tool, with no paid plan required to use it.	Free — listed in this directory as a free tool, with no paid plan required to use it.	Free — listed in this directory as a free tool, with no paid plan required to use it.	Free — listed in this directory as a free tool, with no paid plan required to use it.
Focus areas	time tracking, open source, self hosted, screenshots	project management, open source, self hosted, time tracking	time tracking, invoicing, self hosted, open source	time tracking, privacy, quantified self, open source
Official site	cattr.app	alianhub.com	timetracker.drytrix.com	activitywatch.net
Directory status	Listed	Listed	Listed	Listed

Side-by-side from each listing's own directory data. Full alternative cards are below.

About the Productivity & Notes category

Notes, tasks, and project tools that keep you organized and focused. The Productivity & Notes category on Tools Hub currently lists 2092 tools. Alongside Cattr, it includes ManicTime, sevDesk, invoicely, Invoice Simple.

FreeProductivity & Notestime-trackingopen-sourceself-hostedscreenshots

Alternatives to Cattr

Tools in the same Productivity & Notes category that share focus areas with Cattr — worth comparing before you commit:

Productivity & Notes

Alian Hub

Open-source project management - free forever, on your server, run by AI agents

Freeproject-managementopen-sourceself-hostedtime-tracking

Productivity & Notes

TimeTracker

Self-hosted time tracking software, free and open source

Freetime-trackinginvoicingself-hostedopen-source

Productivity & Notes

ActivityWatch

Automatically track how you spend time on your devices, privately and free.

Freetime-trackingprivacyquantified-selfopen-source

Productivity & Notes

Admidio

Free membership management for organizations, clubs, and associations

Freemembershipself-hostedopen-sourceclubs

Productivity & Notes

AdventureLog

Travel log, trip planner, and world map in one app

Freetraveltrip-plannerself-hostedopen-source

Productivity & Notes

An Otter Wiki

A minimalistic wiki powered by Python, Markdown and Git

Freewikimarkdownopen-sourceself-hosted

More in Productivity & Notes

Comparing tools in the Productivity & Notes category? These related listings are worth a look: ManicTime — Automatic time tracking of apps, websites and documents; sevDesk — German accounting and invoicing with VAT filing and DATEV export; invoicely — Free online invoicing with time, expense and mileage tracking.