Time & Timesheet Workspace · Local Web Application

Sprint.

Focused Work Timer & Rate-Locked Ledger

Working browser app · local data
  • TypeScript
  • Tabular Numerals
  • High-Resolution Clocks
  • LocalStorage
Sprint working clock and precision rate-locked time ledger
Desktop working view
Sprint mobile layout
Mobile responsive view
01 / THE CHALLENGE

The problem & workflow requirements.

Freelancers and consultants lose track of billable time using clunky stopwatches that recalculate historical revenue when client rates change in the future.

02 / ARCHITECTURE & SYSTEMS

Technical decisions and design.

Sprint features a large, distraction-free active timer with project presets. Each recorded interval locks in the accepted hourly rate at the exact moment of timer start. Paused durations are excluded from the dated ledger, and future rate updates never alter historical logs.

03 / TRADEOFFS & RIGOR

Deliberate engineering choices.

Single-purpose timer and ledger; does not include heavy project management Gantt charts or invasive employee monitoring software.

04 / SCOPE & REALITY BOUNDARY

What is real vs. simulated.

Working browser application with synthetic client projects and precision actuals. Supports CSV exports.