While full of amazing content, the app is ephemeral when one switches away to another app. Substack disappears from the app switcher, even losing one's place in the current article. If you don't immediately like an article there is no history to help you find the same article, leaving you lost from something you might want to continue reading. It's almost better to open an article in a browser tab to make sure the article doesn't get lost forever.

Not worth the trouble. Since this app was first introduced, it's gone from bad to worse. It doesn't update activity reliable, and posts I've already read remain as unread for days. As often as not, the list of Notes cycles through the same 4 or 5 notes repeatedly, instead of continuing down the list. It regularly recommends new writers to me that write on subjects that are practically the antithesis of the stuff I tend to read, and it's not possible to edit a comment like you can in the browser.

There are many functionality issues with this app from crashes to drafts not syncing between it and the PC as well as very few features. However, not even being able to log in or get the app to send an email to let me unlock it after it randomly logged me out takes the cake. What is even the point? If you wanted to be desktop only you should've just stayed that way.