Thanks for this! I just got a new phone with latest ios, and my HN reader (this one) was the one app that didn’t get transferred because “it’s no longer available in the App Store”. Even the in-app about links lead to “not available anymore” in app stores. Wonder if there is at least a PWA under the hood...
Same thing on Android, it was removed from the play store. Luckily I had a copy of the .apk on my old phone and could copy it over. It's my main source of consuming and interacting with HN (including writing this comment).