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C-19 COVID Symptom Tracker
A mobile health app that enables users to self-report COVID-19 symptoms daily to support scientific research at leading institutions
since Jun 16, 2026 · HTTP 200
CohortClass of 2026What it is
A mobile health app that enables users to self-report COVID-19 symptoms daily to support scientific research at leading institutions. Participants contribute anonymized data to help researchers at King's College London, Stanford, Harvard, and Massachusetts General Hospital understand and combat the coronavirus.
HTTP liveness
8 probes since Jun 16Jun 16Jul 15
AliveHard-dead (404/5xx/parked)RedirectedUnverified (timeout/DNS/block)
Observed events
probes · press · GitHub- Jun 16, 2026First probe — redirectedRedirected offsite
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Pulse Indexobserved activity
232/4 signal families
Liveness40%0.40
Press30%no data
GitHub20%no data
Tranco10%0.69
Weighted observed activity · updated Jul 15
Cohort survival · Class of 2026weekly
567 products launched in 2026 · 100% still active
567 active0 sunset
Still active
100%
Median lifespan
4.9y