The Dev said in another comment that he expected to release it by the end of August.

https://reddthat.com/comment/1848765

Boost for Reddit was a very popular third-party Reddit app. After Reddit's API changes, causing the third-party apps to shut down, the Boost developer is now making an app for Lemmy.

I agree, the karma count was not something that I wanted to see either.

Did you ever use the official Reddit app? I personally do not like it very much. The third-party Reddit apps were just a whole lot better, at least in my opinion and others. Apps like Boost and Sync were both very popular Reddit apps, but have both now moved on to Lemmy.

Here is a link to the post from the Dev about being a tester and early access for the Boost app. It contains a link to sign up for it.

https://lemmy.world/post/5478381

Boost is probably just going to be an Android app, since Boost for Reddit was also Android only. I wasn't sure if the app you were talking about, Memmy, was an IOS app.

Also, these new communities that I have joined since using the Boost app are not showing the instance name in my list of communities.