Just released SifterReader version 1.8.1 which fixes a very annoying bug that I evidently did not test, and which may have deterred new users. The bug caused the "Oops" screen to show a stack trace of a JSONException, filters could not be found. This was because the file that stores the Sifter filters wasn't saved yet.
So I fixed that, and now instead of that annoying screen, after logging in, first time users will see a "loading" spinner and eventually their issues, if they long-press their project and select issues. I am so sorry!