Comparison

Project Time Tracker vs marble work

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Project Time Tracker

This app helps freelancers and professionals meticulously track their work hours across various projects. It offers clear insights into where time is spent and includes features to prevent overworking. Data is stored locally and accessible offline.

Highlights
  • Project-based time tracking
  • Clear statistics and work hour insights
  • Offline functionality
  • Time Guard to prevent overworking
  • One-tap CSV export
Features
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TIME TRACKING WITHOUT A SIGN-UP – OPEN, START, DONE. No email, no password, no account. ProjectTimeTracker records your working hours per project, works completely offline, and turns your hours into a clean timesheet. Built for freelancers, contractors and anyone with flexible hours who has to prove or bill their time – without team software and without a learning curve. HOW IT WORKS: • Create a project, hit start – the timer keeps running even if you close the app or restart your device • Live Activity on the Lock Screen and in the Dynamic Island: project, elapsed time, status at a glance • Forgot to start it? Add the hours manually afterwards • Notes and tags per entry, so every hour has a reason TIME GUARD AGAINST OVERWORK: Set a daily limit, for one project or across all of them. A progress ring shows where you stand, and when you hit the limit the app reminds you to call it a day. Other apps optimise for more billable hours. This one doesn't. INSIGHTS: • Working time by day, week, month and year • Breakdown per project • Filter by project and by any date range you choose YOUR DATA STAYS YOURS: Everything lives on your device first. Sync between iPhone and iPad runs on an anonymous device ID – you never enter personal data. IPHONE AND IPAD: One app for both. On iPad you get a real split view instead of a stretched iPhone app, two-column charts and keyboard shortcuts (⌘N, ⇧⌘N, ⌘Space). FREE TO USE: Unlimited projects, every feature, all statistics and up to 250 time entries per calendar year – free forever. PREMIUM: • Unlimited time entries • PDF timesheets to send to your clients • Export to Excel, CSV or straight into your calendar • Full JSON backup Premium is a monthly or yearly subscription, cancel anytime. Track time. Analyze work hours. Invoice with confidence. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

marble work

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Build Your Own AI Organization! marble work is the workspace where AI agents and people complete the same work together. The agent researches. You review. The agent publishes. Everything stays in one task chain: with visible progress, clear ownership and a complete activity log. And because great AI without solid operations is just another disconnected tool, projects, clients, tasks, project time and work hours are built in. » PEOPLE AND AI IN ONE TASK CHAIN + Combine as many AI and human steps as your workflow needs + Pass results and files automatically to the next step + Pause for review and approval exactly where a person is needed + Restart from a specific step after making changes + Keep previous result versions and every activity in view » AI AGENTS AS REAL TEAM MEMBERS + Give each agent a role, model and clear behavior guidelines + Connect tools and reusable skills + Use shared company knowledge for voice, audiences and processes + See, edit or delete what an agent has learned + Work with the same agents in tasks and direct chat » WORK THAT STARTS ITSELF + Run tasks automatically every day, week or month, or at their due time + Follow every step live and get notified when your input is needed + Create reports, copy, images, video, audio and PDFs inside the task + See upcoming automated runs on your dashboard » COMPLETE PROJECT MANAGEMENT + Organize tasks in a board or list + Manage projects, clients, subtasks, tags and due dates + Use comments, files, assignees and project access controls + Track project time with a timer or manual entries + Set hourly rates, budgets and billable time + Document work hours, breaks, vacation and sick leave + Measure how much people and AI contributed to each project » YOUR TOOLS. ONE SHARED WORKFLOW. Connect your existing tools (e.g., Notion, Google Workspace, Google Analytics, Search Console, Google Ads, ElevenLabs, Higgsfield, LexOffice) and many more. MCP and REST API also makes marble work part of open AI and developer workflows. » YOUR AI ACCOUNT, NO CREDIT CEILING Use your own OpenAI and Anthropic keys. Pay model usage directly to the provider: with no AI markup and no artificial credit limit from marble work. Token usage stays transparent. » OPEN, TRACEABLE AND SECURE marble work is developed and operated in the EU with GDPR-compliant hosting. Built for marketing teams, agencies, businesses and independent professionals ready to move AI from experiments into reliable day-to-day work. Download marble work now for free and bring AI, people and projects into one shared workflow.

Screenshots

Project Time Tracker4 screens
marble work4 screens

Verdict

The call

The clearest difference is in-app purchases: marble work at none against Project Time Tracker's 2. marble work also leads on update cadence (every 3 days vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Project Time Tracker sells 2 in-app purchases, starting at $2.00 per month. marble work asks for nothing beyond the download.

UpkeepUpdate frequency

Project Time Tracker ships an update every 2 weeks, marble work every 3 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 8 level
Project Time Tracker versus marble work: the parameters behind the verdict, then further details
ParameterProject Time Trackermarble work
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 2 weeksEvery 3 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, Mac — better
Requires iOS18.017.6 — better
Further details — not scored
Size4 MB74 MB
Age rating4+12+
DeveloperLukas HummelRicardo Koehne

In-app purchases

2 purchases

Project Time Tracker

Subscriptions2
  • Monthly Subscription7 Days trial$2.001 Month
  • Yearly Subscription7 Days trial$15.001 Year
None

marble work

No in-app purchases

Questions

Is Project Time Tracker free?
Project Time Tracker is free to download, with in-app purchases available.
Is marble work free?
marble work is free to download, with no in-app purchases.
Do Project Time Tracker or marble work have ads?
Neither Project Time Tracker nor marble work shows ads.
Which is updated more often, Project Time Tracker or marble work?
Project Time Tracker ships an update every 2 weeks, and marble work every 3 days. Most recently, Project Time Tracker was updated on October 24, 2026 and marble work on October 25, 2026.

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