03 / launch•Task Velocity & Time Tracker

Drift-Proof Sprint Kanban With Sub-Millisecond Speed.

Lumist Flow is a zero-setup Kanban board and stopwatch time tracker built for creators and engineers. Log billable hours, organize client sprints, and audit productivity without cloud subscriptions.

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100% Client-Side MemoryHardware-AcceleratedZero Cloud Uploads

lumist.app/flow/workspace

Capabilities

Built for Precision and Total Privacy

Local-First Kanban Architecture

Tasks and project sprints persist directly inside browser IndexedDB. No login requirements, zero loading delays, and complete data sovereignty.

Drift-Proof Stopwatch Timers

Calculates elapsed seconds using absolute UNIX timestamps. Timers remain 100% mathematically accurate even when tabs freeze, sleep, or close.

Invoicing & Workload Audits

Group tasks by client, set custom hourly billing rates, and export itemized CSV reports to calculate billable revenue without cloud subscriptions.

Under The Hood

The Architecture Powering Lumist Flow

Time Engine

Absolute UNIX Chronological Logging

Traditional web stopwatches drift when browser engines throttle inactive tabs. Flow eliminates drift by saving exact UNIX millisecond timestamps at start and stop events, computing durations against Date.now().

Verified Zero-Server Execution

Sorting Algorithms

Fractional-Index Midpoint Reordering

Drag-and-drop operations calculate the exact mathematical midpoint between neighboring card indices. This guarantees instant reordering without expensive full-database array refetches or write collisions.

Verified Zero-Server Execution

Clarity & Trust

Frequently Asked Questions

Is my time-tracking and project data secure?

Flow stores all tasks and timesheet records exclusively inside your browser's sandboxed IndexedDB database. Your work records never touch remote servers. Regularly export JSON backups via Safe or the Reports dashboard to maintain persistent hard-drive archives.

How does Flow prevent timer drift when laptop lids close?

Rather than counting seconds with browser intervals, Flow records the exact timestamp when you hit Start. When stopped, it calculates the difference against the current system time, keeping elapsed hours completely immune to computer sleep states.

Can I export time logs directly into spreadsheets?

Flow exports your productivity logs directly to CSV format, translating raw seconds into standardized decimal hours for accounting in Excel, Numbers, or Google Sheets.

Why does Flow include a manual timezone selector in Reports?

Privacy-focused browsers like LibreWolf or Tor spoof user timezones to UTC. Flow includes a manual timezone selector in the Reports dashboard so calendar boundaries (like weekly hour totals) align with your physical clock.

Ready to execute locally with Flow?

Zero accounts, zero cookies, zero external network requests.

Launch Flow Workspace

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