Keep your laptop open to use keyboard/TouchID while turning off your internal screen completely. Sync brightness/volume via native keys, schedule blue light filter, and boost productivity with Pomodoro and Zen modes.
More than just basic brightness control. Open Clamshell packs advanced display features tailored for MacBook setups.
Blackout your MacBook's internal display completely without closing the lid. Keep using your built-in keyboard, trackpad, and Touch ID smoothly.
Control external monitor's hardware (DDC) brightness and sound output using the native MacBook keyboard keys (F1, F2, and volume keys).
Eye care scheduler that dynamically shifts display colors based on local time. Calibrated to prevent color profile clipping.
Stay focused with a full-screen Zen overlay and customizable Pomodoro cycles providing gentle visual feedback for work and breaks.
Monitor your current power adapter wattage, battery health percentage, and charge cycle counts at a glance with a clean layout.
Get bug fixes and optimizations directly inside the app with the integrated Sparkle 2 update engine—zero hassle, completely secure.
A compact control panel matching the macOS visual aesthetic. Features native sliders, toggle switches, battery status metrics, and hotkey bindings all balanced in a lightweight menu bar utility.
Essential monitor controls are always free, and advanced features can be unlocked forever with a single lifetime license.
No credit card required
One-time payment, lifetime access
Everything you need to know about the license and compatibility.
Yes, each license key allows you to activate the app on up to 3 personal Macs simultaneously. You can easily deactivate a machine to transfer the license to a new one.
Yes, Open Clamshell is built as a Universal Binary, natively supporting both Apple Silicon (M1, M2, M3 series) and Intel architectures. Tested and optimized for macOS 14+ Sonoma.
Yes. Checkout is securely handled by Lemon Squeezy, a globally trusted reseller operating in partnership with Stripe. Your credit card details are encrypted and processed safely under full compliance standards.
Absolutely not. We do not use a subscription model. When your 30-day trial expires, advanced features are paused, but core monitor controls remain active. No automatic charges will ever occur.
Download the free trial now and enjoy complete control over your screens for 30 days.
Download Trial (.zip)