I used to use Boost for Reddit, and thought it was the best app. I’ve been using Connect for Lemmy for ages now and I’ve found it to be very good - there are some teething issues, but on the whole it does a really good job for me of replacing Boost, and it’s always getting updated with info from the users’ own experiences. I will gladly try the Boost for Lemmy app when it does arrive, but for now Connect is just fine.