Welcome to IntervalTimer Duo for macOS, a versatile dual-timer app perfect for interval training, the Pomodoro Technique, and any activity requiring timed intervals.
macOS-Specific Features
Compact Mode - Minimal window for unobtrusive timing
Always on Top - Keep the timer visible above other windows
Keyboard Shortcuts - Control the timer without touching the mouse
Native macOS Design - Beautiful integration with your desktop
Settings Window - Organized settings with sidebar navigation
1. Getting Started
Installation
1
Download IntervalTimer Duo from the Mac App Store
2
Open IntervalTimer Duo from Applications or Launchpad
3
Set your desired timer durations and start timing
2. Main Interface
Timer Display
The main window shows two timers:
Timer 1 - Your primary interval (e.g., work time)
Timer 2 - Your secondary interval (e.g., rest time)
Basic Controls
Start/Pause - Begin or pause the current timer
Reset - Reset both timers to their initial values
Timer Duration - Click on the time to adjust duration
3. Compact Mode
Compact mode shrinks the window to a minimal size, perfect for keeping the timer visible while working.
Enabling Compact Mode
1
Open Settings (⌘,)
2
Go to the Appearance tab
3
Toggle "Compact mode" on
Tip: Combine Compact mode with "Always on top" for the perfect unobtrusive timer setup.
4. Always on Top
Keep IntervalTimer visible above all other windows, even when working in other applications.
Enabling Always on Top
1
Open Settings (⌘,)
2
Go to the Appearance tab
3
Toggle "Always on top" on
5. Keyboard Shortcuts
Control IntervalTimer Duo efficiently with keyboard shortcuts:
Available Shortcuts
⌘ , - Open Settings
Space - Start/Pause timer
R - Reset timer
Customizing Shortcuts
You can customize keyboard shortcuts in the Settings window under the "Keyboard Shortcuts" tab.
6. Settings
Access settings via the menu bar (IntervalTimer Duo → Settings) or ⌘ ,
General Tab
Enable sound alerts - Play sound when timer ends
Language - Choose from English, Japanese, French, or German
Sound Tab
Timer 1 Alert - Choose and preview sound for Timer 1
Timer 2 Alert - Choose and preview sound for Timer 2
Alert Volume - Adjust notification volume
Appearance Tab
Theme - System, Light, or Dark mode
Show seconds - Display seconds on the timer
Always on top - Keep window above others
Compact mode - Minimize window size
Keyboard Shortcuts Tab
Customize global keyboard shortcuts for timer control.
7. Use Cases
Pomodoro Technique
Timer 1: 25 minutes (work)
Timer 2: 5 minutes (break)
Enable Compact mode + Always on top
HIIT Training
Timer 1: 30 seconds (high intensity)
Timer 2: 15 seconds (rest)
Use audio alerts to know when to switch
Presentations
Timer 1: Presentation time
Timer 2: Q&A time
Keep Always on top enabled while presenting
Note: When using for exercise, always warm up properly and listen to your body.
8. Subscription
IntervalTimer Duo offers a free trial. After the trial period, a subscription is required to continue using all features. Subscribe to support ongoing development.
Need Help?
If you have any questions or encounter any issues, please contact us: