I use this, from f droid
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I use this primarily, it's more than enough for basic tracking and UI is good. A little unpolished at times, but I am yet to find anything on F-Droid which is better.
This is looking good, thanks.
Found this on F-Droid https://github.com/brandonp2412/MarketMonk
Not completely FOSS since it uses the Yahoo api but might be a step in the right direction.
Thanks.
Does not seem to support tracking ETFs unfortunately.
Sorry for the oversight on my part. The only other option I know of is ghostfolio, although it's more Involved (selfhosted) and a lot of users seem to have problems with it.