You can search, sort, and filter reviews by keyword, date, rating, and more. Xreviews also lets you respond to App Store reviews directly from the app. You can even filter out reviews that you already responded to.
For our power users, Xreviews supports multiple App Store accounts. Have too many apps? You can hide apps for which you don't need to see reviews. And once the initial import completes, you can view all customer reviews offline.