RedReader is an unofficial, open source client for Reddit that is free and ad-free. It allows users to swipe posts and comments left and right to perform customizable actions such as upvoting, downvoting, saving, and hiding. The app also features advanced cache management, automatically storing past versions of posts and comments.

RedReader supports multiple accounts and has a two-column tablet mode that can be used on phones if they are big enough. Users can choose to precache images (always, never, or Wi-Fi only) and there is a built-in image viewer and GIF player. The app also supports imgur albums and gifv files and offers compression.

In addition, RedReader has a night mode for a dark theme and translations for some languages. The source code for the app is available on GitHub. RedReader is a great option for those who want an ad-free Reddit experience with customizable actions and advanced cache management.