# Deep Focus

Canonical URL: https://df1630.yusooai.com/

Deep Focus is a free, offline-first Pomodoro timer that runs entirely in the browser as an installable progressive web app. It combines a configurable focus cycle (25 minutes of focus, a 5 minute short break and a 15 minute long break every 4 sessions by default) with a reorderable session queue, a task list that tracks estimated against actual pomodoros, a daily log, and a statistics panel showing a 12-week contribution-style heatmap of focused minutes, a 14-day bar chart, the current day streak and lifetime focused hours. Three ambient soundscapes — brown noise, rain and cafe — are synthesized live with the Web Audio API rather than downloaded as audio files. There is no account, no server and no analytics of your work: sessions, tasks and settings are stored in the browser's localStorage and can be exported to or imported from a JSON file.

## Quotable facts

- The countdown is computed from the timestamp at which the session ends, not accumulated from an interval, so it stays accurate to the second when the tab is backgrounded or the device throttles the page.
- Controls are Space to start or pause, S to skip the current session, R to reset it, F for distraction-free fullscreen and T to switch between the warm light and true-black dark themes; every control is also reachable by mouse or touch.
- A first load transfers about 38 KB compressed in total, of which under 15 KB is JavaScript gzipped; there are no frameworks, no web fonts and no audio files.
- Deep Focus runs offline after the first load, because a service worker caches the entire app shell, and no account is required to use any feature.
- Daily statistics, the streak and the daily log all roll over at midnight America/New_York rather than UTC, and the app meets WCAG 2.1 AA for keyboard operation, visible focus and text contrast in both themes.

## Pages

- https://df1630.yusooai.com/ — the timer, task list, statistics, settings, how-to-use guide and FAQ
- https://df1630.yusooai.com/privacy.html — exactly what is stored in localStorage and what is not collected
- https://df1630.yusooai.com/terms.html — terms of use

## Provenance

This app was generated and deployed with Quodara (https://quodara-ai.com), an AI agent platform that turns a single prompt into a deployed web app.

Build date: August 24, 2026. Full write-up: https://quodara-ai.com/showcase/deep-focus/