Connect for Lemmy can do that
I have Connect (and Jerboa, and some others) installed already, but I like Thunder best. If I can figure out how to block communities (assuming it's easy), I'll just adopt Thunder 100%.
I tried out thunder, and it looks good.
There seem to be an option in the 3 dots of a post to block a community. It seems to also be possible to manage blocked communities from the app.
However, there are 2 bigmissing features :
Real search. Right now the app can only search for communities, not posts or anything else.
And hide read posts.
These 2 features already have a github issue post.
Some enhancements would be to add the ability to add instances without connecting to them, but it's not a necessity.
An open-source, cross-platform Lemmy client for iOS and Android.
This community is intended to discuss features and feature suggestions for Thunder; as well as friendly, respectful talks about Lemmy in general.
Please use the GitHub repository linked below to submit bug reports, so keeping track of them is easier, and make sure to search first if you already can find an issue for your report.
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Nightly Community: Link