You asked about Calendar

20 people built something like it. 6 are gone.

That is 30% of the ones whose fate we could settle, against 23% across the whole register.

Matching
27
Gone
30%
Median life
Acquired
0

Matching launches

checked 12 hours ago · 250 probed today
LaunchedWhat it wasToday
2022-11-17
tweek.so
still up
2022-03-18
calenday.co
unverified
2021-01-09
convier.me
gone~19mo
2022-01-18
life-cal.com
still up
2023-01-11
lowtechguys.com
still up
2022-03-30
calendar.sharats.me
gone
2023-12-09
useminimal.com
still up
2021-02-28
querycal.com
unverified
2023-03-06
stavros.io
still up
2021-01-03
organizedly.io
gone~4mo
2022-03-13
frcal.qt.ax
still up
2022-08-21
atomiclife.app
moved
2023-01-23
todogrids.com
gone
2021-03-01
getclockwise.com
still up
2021-04-06
birthday.report
gone
2022-12-13
onin.co
moved
2022-01-10
recalendar.me
still up
2021-10-20
lifeofdiscipline.com
still up
2023-07-10
uptimelog.app
still up
2023-08-30
pyas.io
still up
2023-11-09
flowlance.com
still up
2021-02-25
tweek.so
still up
2022-12-05
scottantipa.com
gone
2023-12-13
findtime.fberge.com
unverified
2022-12-06
aerotime.com
still up
2022-02-07
savvyapp.cc
unverified
2023-04-27
onin.co
moved

How this compares

How this was made. Show HN entries are every post from 2021 to 2023 with at least five points that linked to its own domain; code hosts and free hosting are excluded, because a repository outlives the effort behind it. Product Hunt entries needed 100 votes — a far higher bar, so they are the promoted top slice rather than a like-for-like sample. Both are judged by asking the domain whether it still answers: gone means it no longer resolves, refuses the connection, serves a parking page, or says plainly that it shut down. An HTTP error is not counted as gone — a server answering 404 is one somebody still pays for, and an audit of 25 gone-calls found two such sites alive with only a moved homepage. Y Combinator entries use the status YC publishes itself, which is why only those can say acquired. Squatted domains — a lapsed name now serving somebody else's site — are not detected, so these figures run slightly low.