When comparing RedReader vs Slide for Reddit, the Slant community recommends Slide for Reddit for most people. In the question“What is the best Reddit app for Android?” Slide for Reddit is ranked 1st while RedReader is ranked 2nd. The most important reason people chose Slide for Reddit is:
Slide for Reddit guarantees that there will never be advertisements in the app.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Free with no ads/tracking
The app is completely free and there is no tracking through advertisement since there are none. For those that are security conscious on their devices this makes a great choice for a Reddit app.

Pro Simple navigation
Scrolling and swiping actions make for an intuitive interface that is easy to control.

Pro Open Source
RedReader is completely open source meaning the code is available for anyone to look at or use. It's a completely open environment for understanding the app if one is so inclined.

Pro Clean UI
The user interface is simple in its layout making it easy to read and use.
Pro Truly Ad-free
No ads, open-source.
Pro No advertisements
Slide for Reddit guarantees that there will never be advertisements in the app.
Pro Casual subs
Users can set a subreddit to casual which will not show the sub on the users front page, but still allows the sub to be easily viewed when selecting it individually.
Pro Free version is open-source
Released under GPLv3 license.
Pro Matches the design of newer Android devices
The Material Design guidelines were used 100% in the design of Slide for Reddit, making for an app that fits well on newer Android devices.
Pro Themes and user set color coded subreddits
Users can set colors to their favorite subreddits allowing for an easier cursory glance at the info contained in the app with over 50 color combinations. When combined with the three available themes this allows for over 150 theme combinations.
Pro AMA mode
AMA mode allows for the user to see OP comments easily by color coding them.
Cons
Con ugly
Con Does not start gif/video with muted audio
Built By the Slant team
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