How to Use StopwatchPro

Controls

• Start: Begin timing from zero or resume from paused state
• Pause: Temporarily stop the timer without resetting
• Reset: Clear the timer back to 00:00:00.000
• Fullscreen: Enter fullscreen mode for better visibility

Keyboard Shortcuts

• Space: Start/Pause the timer
• R: Reset the timer
• F: Toggle fullscreen mode

Use Cases

Perfect for timing presentations, study sessions, cooking, exercises, or any activity requiring precise timing.

How It Works

1. Start the timer to begin tracking
2. Click "Lap" button to record each lap time
3. View real-time statistics: fastest lap, slowest lap, average time
4. Export results to CSV or copy to clipboard

Features

• Split Times: See individual lap durations
• Total Time: Track cumulative elapsed time
• Lap Analysis: Fastest and slowest laps highlighted
• Export Data: Download lap data as CSV
• Share Results: Generate shareable URL with lap times

Use Cases

Ideal for running laps, swimming intervals, cycling splits, race timing, or any repetitive activity tracking.

Configuration

• Work Duration: Set how long each work interval lasts
• Rest Duration: Set recovery time between intervals
• Rounds: Number of work/rest cycles to complete
• Warmup: Optional warmup period before starting
• Cooldown: Optional cooldown period after finishing

Presets

• Tabata: 20s work / 10s rest, 8 rounds (classic protocol)
• HIIT: 30s work / 15s rest, customizable rounds
• Circuit Training: Longer intervals with transitions
• Custom: Build your own workout timer

Audio & Visual Cues

• Color Coding: Green (work), Blue (rest), Yellow (warmup/cooldown)
• Sound Alerts: Beeps for transitions and final seconds
• Voice Announcements: Optional spoken phase names
• Progress Bar: Visual countdown for each interval

Saving Workouts

Custom interval programs can be saved to your browser for quick access. Your settings are preserved across sessions.

Use Cases

Perfect for HIIT workouts, Tabata training, circuit exercises, boxing rounds, yoga flows, or any structured interval training.

How It Works

1. Set your target time (hours, minutes, seconds)
2. Click Start to begin countdown
3. Receive alert when time reaches zero
4. Optional: Continue into negative time to track overtime

Features

• Precise Targeting: Set exact target times
• Overtime Tracking: Continue past zero to track overruns
• Alerts: Audio and visual notifications at zero
• Pause/Resume: Stop and continue as needed

Use Cases

Great for timed exams, presentations, meetings, cooking timers, or any deadline-based activity.

Automatic Recording

All timing sessions are automatically saved to your browser's local storage. No account required!

What's Tracked

• Session Type: Stopwatch, Lap Timer, Interval, or Countdown
• Duration: Total time for each session
• Date & Time: When the session occurred
• Details: Configuration settings and results

Statistics Dashboard

• Total Time Tracked: Cumulative duration across all sessions
• Session Count: Number of timing sessions by type
• Average Duration: Mean session length
• Longest Session: Your longest recorded timing

Export & Manage

• Export to CSV: Download your history for analysis
• Filter by Date: View sessions from specific time periods
• Filter by Type: See only stopwatch, lap, interval, or countdown sessions
• Clear History: Delete all recorded sessions (with confirmation)

Theme Options

• Light Mode: Bright, clear interface
• Dark Mode: Easy on the eyes in low-light conditions
• High Contrast: Enhanced visibility for accessibility

Sound Settings

• Volume Control: Adjust notification volume
• Enable/Disable: Turn sounds on or off
• Voice Announcements: Toggle spoken phase names

Display Preferences

• Time Format: Choose 12-hour or 24-hour format
• Milliseconds: Show or hide millisecond precision
• Large Text Mode: Increase font size for better readability

Accessibility

• Reduced Motion: Minimize animations for vestibular sensitivity
• Screen Reader Support: Full keyboard navigation and ARIA labels
• High Contrast Mode: Enhanced visibility for vision impairments

Share Timer Configurations

Every timer has a "Share" button that generates a unique URL encoding your current settings. Recipients can click the link to instantly load your exact configuration.

What Can Be Shared

• Stopwatch States: Share current time display
• Lap Results: Share complete lap timing data
• Interval Programs: Share workout configurations
• Countdown Targets: Share target times

Use Cases

• Coaches sharing workout programs with athletes
• Teachers sharing timed activities with students
• Trainers distributing interval routines to clients
• Teams coordinating synchronized timing activities

Q: Is StopwatchPro really free?

A: Yes! StopwatchPro is completely free with no ads, subscriptions, or hidden fees. All features are available to everyone.

Q: Do I need to create an account?

A: No account required! All your data is stored locally in your browser. Your privacy is our priority.

Q: Will my data sync across devices?

A: Currently, data is stored locally per device. You can export your history as CSV and import it on another device if needed.

Q: Can I use this offline?

A: Yes! Install StopwatchPro as a Progressive Web App (PWA) for full offline functionality.

Q: How accurate is the timing?

A: StopwatchPro uses high-precision timing APIs for millisecond accuracy, suitable for professional timing needs.

Q: Can I run multiple timers simultaneously?

A: Yes! Open multiple browser tabs to run different timers at the same time.