Monitor vertical iPhone video from your Mac
QuickTime does not let you monitor video vertically for some reason.
So I built ShootVertical to use until Apple fixes it.
Free download. No login required.
Setup

Desktop app
Download ShootVertical Desktop on Mac.

iPhone app
Download ShootVertical on iPhone.

Same network
Connect both devices to the same Wi-Fi.

4K capture
Monitor and shoot 4K video directly to your phone in portrait or landscape.
Why ShootVertical Exists

Apple won't let you monitor your iPhone video vertically in QuickTime.
QuickTime also won't let you record 4K video directly to your iPhone.
This app will only exist until Apple fixes these issues in QuickTime.
The preview on the Mac app is a bit laggy because this is not using Apple's recommended Continuity Camera path.
But you can't do Continuity Camera vertically.
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