I've created a mobile-first counting app called "Count" with the following features:

Key Features:

• Two-sided interface: Red side (left) and green side (right) that are equally sized
• Touch-friendly: Large clickable areas optimized for mobile devices
• Individual counters: Each side maintains its own count
• Timer functionality: Automatically starts when first click occurs, with play/pause control
• Reset button: Resets both counters and timer
• Total counter: Shows combined count at the bottom
• Responsive design: Adapts to different screen sizes

Mobile Optimizations:

• Full-screen layout that maximizes touch areas
• Large, readable numbers (6xl on mobile, 8xl on larger screens)
• Touch-friendly buttons with proper spacing
• Visual feedback on button presses with color transitions
• Clean header and footer layout for controls

User Experience:

• Timer starts automatically on first click
• Visual feedback with hover and active states
• Clear labeling for each side
• Intuitive reset functionality
• Professional color scheme with good contrast

The app is fully functional and ready to use on mobile devices with smooth touch interactions and responsive design principles.

I've enhanced the Count app with a fully editable timer/countdown system! Here are the new features:

Timer/Countdown Features:

• Mode Toggle: Switch between "Timer" (counts up) and "Countdown" (counts down) modes
• Editable Countdown: Click the settings icon to set custom minutes and seconds

• Visual Feedback:

  • Countdown turns red when 10 seconds or less remain
  • "TIME'S UP!" message appears when countdown reaches zero
  • Timer automatically stops at zero in countdown mode

New Controls:

• Mode Button: Toggle between Timer/Countdown modes (highlighted when in countdown mode)
• Settings Button: Only appears in countdown mode - click to edit the time

• Edit Interface:

  • Separate input fields for minutes and seconds
  • Check mark to save changes
  • X button to cancel editing
  • Number inputs with proper min/max validation

Enhanced User Experience:

• Smart Auto-start: Timer starts when you first click either side (unless editing)
• Edit Mode Protection: Counting sides are disabled while editing timer
• Persistent Settings: Countdown time is remembered when switching modes

• Reset Behavior:

  • In timer mode: resets to 00:00
  • In countdown mode: resets to your set time

Mobile Optimizations:

• Compact header layout with intuitive controls
• Touch-friendly edit interface
• Clear visual states for all modes
• Responsive design maintains usability on all screen sizes

The app now provides flexible timing options perfect for games, workouts, debates, or any activity where you need both counting and time tracking!