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Owntracks was one of the nextcloud apps, I used it years ago: https://owntracks.org/
It’s also on fdroid: https://f-droid.org/packages/org.owntracks.android/
I found the nextcloud app it is PhoneTrack:
It has a big list of supported apps: https://github.com/julien-nc/phonetrack/blob/main/doc/user.md
This topic pops up in random news sites like every 5 years, and usually the conclusion is people with these names have less and less problems, as systems evolve.
Nowadays names which looks like some vulgar words cause more problems, it’s called the Scunthorpe problem from the city of Scunthorpe. As this is a shitty article, this actual problem is not even mentioned, classic.