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Headless Simulator Runs and Device Log Capture

Headless Simulator Runs and Device Log Capture

Headless Simulator Runs and Device Log Capture

By Daniel Bernal

·

April 01, 2026

·

8 min read

1.20 gives you more control over simulator visibility and easier access to what your app logs on device.

Headless simulator runs

Simulator.app now opens by default when FlowDeck launches a simulator. Pass --headless to keep it hidden, replacing the old FLOWDECK_HEADLESS environment variable.

flowdeck run -s "iPhone 16" --headless
flowdeck run -s "iPhone 16" --headless
flowdeck run -s "iPhone 16" --headless

Simulator hardware control also moved to a new internal layer, fixing a bug where landscape-left and landscape-right orientations were swapped.

Improved device log capture

Device log capture on app launch is more reliable, with better OSLog mirroring so flowdeck logs picks up more of what your app is actually logging on-device.

Update

Run flowdeck update in your terminal to get the latest version.

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