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Knock
Knock replaces traditional passwords with a physical interaction—tap your iPhone to unlock your Mac
verified Jul 12, 2026 · HTTP 200
CohortClass of 2014What it is
Knock replaces traditional passwords with a physical interaction—tap your iPhone to unlock your Mac. This biometric-adjacent approach leverages your phone's existing security as a second factor for computer access, streamlining the login experience while maintaining strong authentication.
HTTP liveness
9 probes since Jun 16Jun 16Jul 12
AliveHard-dead (404/5xx/parked)RedirectedUnverified (timeout/DNS/block)
Observed events
probes · press · GitHub- Jun 16, 2026First probe — liveAlive · 200 OK
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Pulse Indexobserved activity
412/4 signal families
Liveness40%1.00
Press30%no data
GitHub20%no data
Tranco10%0.11
Weighted observed activity · updated Jul 15
Cohort survival · Class of 2014weekly
10,235 products launched in 2014 · 99% still active
10,131 active104 sunset
Still active
99%
Median lifespan
4.9y