someone from SU explained a bit while ago, basically IOS ecosystem is simpler and more stable, while with android, you have to deal with 7 versions still in use, plus some extra layers on top, and a high variety of different specific machines and cases.
same with ipad VS android tablets. plus the ipad has a very good pen and the pro version comes with a lidar.
and in the US, where trimble is located, 56% of the phones are ios.
all combined, it made more sense for SU to focus on ios than android.
that being said, I completely agree that the viewer should be at least maintained every year.
right now the only solution is to use the “share a link” from trimble connect. that link will open in your browser, not the app.