
Knock on your MacBook. Your windows vanish. Knock again
Knock twice on your MacBook and every window hides behind a spreadsheet. Knock again and it all comes back. $5 once, for up to 3 Macs.
KnockKnock is a SaaS productivity tool for Mac users that allows them to hide all open windows with a double knock on their device. It is available for a one-time purchase of $5, supporting up to three Macs.
A source that found nothing is a measurement. A source that has not run is a gap. Neither means the launch lacks the thing.