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CalculatePlus
Perform basic and free online calculations and conversions
since Jul 4, 2026 · HTTP 503
CohortClass of 2017What it is
Perform basic and free online calculations and conversions. — CalculatePlus is a free, amazing and intuitive Web-application to perform your every-day basic calculations and conversions online. CalculatePlus is the new way of performing your daily basic calculations, such as basic +/- or percentage calculations on the Web. Besides this feature, it is able to perform conversions on a huge database very fast. [Android, iOS, Web App]
HTTP liveness
13 probes since Jun 13Jun 13Jul 13
AliveHard-dead (404/5xx/parked)RedirectedUnverified (timeout/DNS/block)
Observed events
probes · press · GitHub- Jul 4, 2026Went darkDead · 5xx
- Jun 13, 2026First probe — liveAlive · 200 OK
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Pulse Indexobserved activity
52/4 signal families
Liveness40%0.00
Press30%no data
GitHub20%no data
Tranco10%0.49
Weighted observed activity · updated Jul 15
Cohort survival · Class of 2017weekly
13,497 products launched in 2017 · 100% still active
13,462 active35 sunset
Still active
100%
Median lifespan
4.9y