Pomodoro Timer

Focus Time
25:00

Tasks & Goals

Quality Trends

-
Avg Focus Quality
-
Avg Rest Quality
0
Total Ratings
0
Skipped Pomodoros
0
Skipped Rests
insights

No quality ratings yet. Complete a session to start tracking!

Weekly Progress

0
Pomodoros
0h 0m
Focus Time
0
Tasks Completed
0
Day Streak

Settings

Storage Usage 0%
0 KB of 4 MB used

Notifications

Sound Notifications
Browser Notifications

Timer Settings

Auto-start Breaks
Auto-start Pomodoros
Resume Timer After Refresh

Quality Tracking

Quality Dialog

info This feature prompts you after each session. While it may feel intrusive, tracking quality helps you understand your focus patterns over time.

Sessions

Data Management

visibility Focus Mode Active (ESC to exit)
notifications
Session Complete!
Time for a break

Welcome to Sphinx Focus!

Before you begin using this productivity tool, please read the following disclaimer:

This application is provided for informational and productivity purposes only. While the Pomodoro Technique is a widely-used time management method, results may vary for different individuals.

The app stores all your data locally in your browser using encrypted localStorage. Your data never leaves your device. However, clearing your browser data will result in loss of your stored information unless you have exported a backup.

The developers of this app are not responsible or liable for any loss of data, productivity outcomes, or any other direct, indirect, incidental, special, or consequential damages arising from the use of this application.

You must be at least 13 years old to use this app.

By clicking "I Agree", you acknowledge that you have read this disclaimer and agree to its terms.

info Information & Guides

How Storage Works

Sphinx Focus stores all your data locally in your browser using encrypted localStorage. Your data never leaves your device.

Storage Limits

Maximum Storage
4 MB
Sessions Limit
1,000
Quality Ratings
1,000
Data Retention
90 days

Automatic Protection

Sphinx Focus automatically manages storage for you:

  • 90-Day Retention: Data older than 90 days is automatically removed
  • Progressive Cleanup: When storage reaches 75%, older data is gradually removed
  • Smart Limits: Only the most recent 1,000 sessions and ratings are kept
  • User Alerts: You'll be notified when storage is getting full

What Happens When Storage Gets Full?

75-79%
Light Cleanup: Keep last 500 sessions/ratings, remove completed tasks older than 7 days
80-89%
Medium Cleanup: Keep last 250 sessions/ratings, remove all completed tasks
90%+
Aggressive Cleanup: Keep last 100 sessions/ratings, keep only active tasks

Best Practices

  • Export Regularly: Use "Export Data" monthly to backup your progress
  • Clear Old Data: After exporting, use "Clear All Data" to start fresh
  • Manage Tasks: Complete and delete tasks you no longer need
  • Watch Warnings: Pay attention to storage notifications
info Note: Your active tasks, settings, and preferences are never automatically deleted.

How It Works

Fibonacci Guided Mode is an adaptive focus timer that automatically adjusts your session length based on your quality ratings. It uses the Fibonacci sequence to progressively increase or decrease your focus time.

The Fibonacci Sequence

1 2 3 5 8 13 21 34 55 89

Focus sessions range from 1 to 89 minutes

Automatic Adjustment Rules

trending_down
Rating < 7

Decrease to previous Fibonacci interval

trending_flat
Rating 8-9

Stay at current interval

trending_up
Rating 10

Increase to next Fibonacci interval

Break Duration

Breaks are automatically calculated using a 1:5 ratio from your focus time. For example:

  • 1 min focus = 12 seconds break
  • 2 min focus = 24 seconds break
  • 3 min focus = 36 seconds break
  • 5 min focus = 1 minute break
  • 8 min focus = 1 min 36 sec break
  • 13 min focus = 2 min 36 sec break
  • 21 min focus = 4 min 12 sec break
  • 34 min focus = 6 min 48 sec break
  • 55 min focus = 11 minutes break
  • 89 min focus = 17 min 48 sec break

Requirements

info

Quality Dialog must be enabled for Fibonacci Guided Mode to work. It will be automatically enabled when you activate this mode.

Getting Started

  1. Click the Functions icon (ƒ) in the timer card header
  2. The mode will activate and Quality Dialog will be enabled
  3. Start your first 1-minute focus session
  4. After completion, rate your focus quality (1-10)
  5. The system automatically adjusts your next session length
  6. Continue the cycle - the timer adapts to your optimal focus duration

Customization

Click the Settings icon (⚙️) next to the mode toggle to customize:

  • Rating thresholds for adjustments
  • Minimum and maximum duration limits
  • Excluded numbers from the sequence

history What's New

Version 2.2.0 Current

November 2025

🎨 User Experience

  • Fibonacci Modal Improvements - Info/close buttons use primary color, removed dividers, "Save Customization" aligned with action buttons
  • Button Hover Effects - Added glow, subtle zoom, and color shifts to all buttons for better interactivity
  • Timer Controls Enhancement - Main button alternates between "Start", "Resume", and "Pause"; Reset returns to "Start"

🐛 Bug Fixes

  • Timer Reset Behavior - Reset now fully clears session state, showing "Start" instead of "Resume"

Version 2.1.2

October 2025

🎨 User Experience

  • Version Modal - Removed double scrollbar; only the styled inner content scrolls
  • Scrollbar Spacing - Added right padding and stable scrollbar gutters for better readability
  • Storage Info Modal - Removed double scrollbar; consistent styled scrolling

🐛 Bug Fixes

  • Task Ordering - New and re-activated tasks now always appear at the very top

Version 2.1.1

October 2025

✨ New Features

  • Skip Tracking - Track and display skipped Pomodoros and skipped Rests
  • Two new stat cards in Quality Trends section showing skip counts
  • Persistent storage of skip statistics across sessions
  • Smart Storage Management - Automatic data cleanup when storage limits are approached
  • Progressive cleanup strategies (light, medium, aggressive) based on storage usage
  • Automatic removal of data older than 90 days

🛡️ Storage Protection

  • QuotaExceededError Handling - Gracefully handles storage full scenarios
  • User notifications when storage is full or nearing capacity
  • Automatic retry with data cleanup if save fails due to quota
  • Storage limits reduced for safety: 1,000 sessions, 1,000 quality ratings (down from 10,000 each)
  • Warnings at 75% storage usage, cleanup at 80%+

🎨 User Experience

  • Modal Improvements - Modals can now be closed by clicking on the background
  • Enhanced modal interaction for better usability
  • Mobile Responsiveness - Significantly improved mobile experience for all screen sizes
  • Optimized layout, typography, and spacing for phones (including iPhone SE, Pixel 7, etc.)
  • Better button sizing and touch targets on mobile devices
  • Improved readability and usability on small screens
  • Storage Info Modal - New info icon with comprehensive storage management explanation
  • Storage Usage Indicator - Real-time progress bar in settings showing storage usage
  • Color-coded storage warnings (green < 75%, yellow 75-89%, red 90%+)

🐛 Bug Fixes

  • Quality Chart Display - Fixed chart rendering to show smooth curves connecting data points instead of isolated dots
  • Enhanced visual continuity in Quality Trends chart for better data visualization

Version 2.1.0

October 2025

✨ New Features

  • Quality Dialog - Rate your focus and rest quality after each session
  • Quality Trends Chart - Visualize your focus and rest quality over time with dual-line chart
  • Quality Statistics - Track average focus quality, rest quality, and total ratings
  • Settings Control - Toggle quality tracking on/off with helpful disclaimer

📊 Quality Tracking

  • Rate focus quality (1-10) after work sessions
  • Rate rest quality (1-10) after breaks
  • Beautiful slider interface with real-time feedback
  • Skip option - no pressure to rate every session
  • Encrypted storage for all quality data
  • Export/import support included

🎨 User Experience

  • Non-intrusive dialog timing (500ms delay)
  • Works seamlessly with auto-start features
  • Empty state with helpful guidance
  • Professional UI matching app design

Version 2.0.0

October 2025

🔐 Security Enhancements

  • AES-GCM 256-bit Encryption - All data now encrypted at rest
  • XSS Protection - Complete input sanitization
  • Data Validation - Comprehensive validation on all stored data
  • Import Security - Multi-layer validation for imported files
  • Storage Limits - Protection against quota exhaustion

🏗️ Architecture Improvements

  • Service Layer - Clean separation of concerns
  • Encryption Service - Dedicated encryption management
  • Storage Service - Centralized storage operations
  • Error Handling - Comprehensive error recovery

✨ New Features

  • Timer Persistence - Timer continues after page refresh
  • Resume Notification - Visual feedback when timer resumes
  • Disclaimer Modal - Professional first-time user experience
  • Auto Migration - Seamless upgrade from v1.0
  • Resume Control - Optional setting to disable timer resume

📚 Documentation

  • Complete security documentation (SECURITY.md)
  • Comprehensive testing guide (TESTING.md)
  • Quick start guide (QUICKSTART.md)
  • Detailed improvements log (IMPROVEMENTS.md)

Version 1.0.0

Initial Release

🎯 Core Features

  • Pomodoro timer with customizable durations
  • Task management system
  • Session tracking and statistics
  • Dark and light themes
  • Data export/import
  • Browser notifications
  • Keyboard shortcuts

star Rate Your Session Quality

How would you rate this session?

5
1 2 3 4 5 6 7 8 9 10

functions Fibonacci Mode Settings

Requirements

info

Quality Dialog must be enabled for Fibonacci Guided Mode to work. It will be automatically enabled when you activate this mode.

Settings