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Freebook Sifter
Freebook Sifter aggregates Amazon's free eBook offerings into an organized, searchable list format
last checked Jul 12, 2026 · Timeout
CohortClass of 2016What it is
Freebook Sifter aggregates Amazon's free eBook offerings into an organized, searchable list format. The web application simplifies discovery of no-cost digital books by curating and presenting available titles in an accessible interface.
HTTP liveness
9 probes since Jun 16Jun 16Jul 12
AliveHard-dead (404/5xx/parked)RedirectedUnverified (timeout/DNS/block)
Observed events
probes · press · GitHub- Jul 4, 2026Probe inconclusiveTimeout
- Jun 16, 2026First probe — liveAlive · 200 OK
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Pulse Indexobserved activity
82/4 signal families
Liveness40%0.20
Press30%no data
GitHub20%no data
Tranco10%0.01
Weighted observed activity · updated Jul 15
Cohort survival · Class of 2016weekly
13,657 products launched in 2016 · 100% still active
13,633 active24 sunset
Still active
100%
Median lifespan
4.9y