Cryptocurrency donations for bots, groups and channels
Show a button for sending quick donations to maintainers of bots, groups or channels using cryptocurrency. This could use either an established cryptocurrency like Bitcoin, Etherium, EOS, etc. – or some…
Perhaps the problem isn't so much a lack of open source file managers, but you looking in the wrong place (playstore). If you really wanted to find open source app, look in f-droid instead.
Not only that, but android has had a built-in file manager at least since v6.0