Plenary is described as 'privacy focused simple and modern RSS reader and offline reader app for Android. Subscribe to RSS feeds of your choice and and get updates from those feeds automatically. Save article to your local storage and read it later anywhere' and is an app in the News & Books category. There are more than 50 alternatives to Plenary for a variety of platforms, including Online / Web-based, iPhone, iPad, Mac and Android. The best alternative is Pocket, which is free. Other great apps like Plenary are Feedly (Freemium), Inoreader (Freemium), QuiteRSS (Free, Open Source) and Tiny Tiny RSS (Free, Open Source).
Save webpages to read later, and eliminate cluttering of bookmarks with sites that are merely of a one-time interest. With Pocket, you can read at home, work, on the plane, or during your commute; even without an internet connection.
Feedly is a better way to organize, read and share the content of your favorite sites. It weaves the content from the RSS feeds of your favorite websites into a fun magazine-like experience and provides seamless integration with social networks.
Discover, share and read the best on the web. With Inoreader, content comes to you, the minute it's available. Subscribe to RSS Feeds, Blogs, Podcasts, Twitter searches, Facebook pages, even Email Newsletters! Get unfiltered news feeds or filter them to your liking.
Tiny Tiny RSS is an open source web-based news feed (RSS/Atom) reader and aggregator, designed to allow you to read news from any location, while feeling as close to a real desktop application as possible.
Instapaper is a simple tool to save web pages for reading later. To save web pages for later offline reading: go to Instapaper.com, install the Read Later bookmark, and mark any pages you'd like to read later.
NewsBlur is a personal news reader that brings people together to talk about the world. It shows you the original site and allows you to read stories directly off the site while keeping track of what you read. It also filters and highlights stories you like and dislike.
Netvibes is a multi-lingual Ajax-based personalized start page or personal web portal much like Pageflakes, My Yahoo!, iGoogle, and Microsoft Live. It is organized into tabs, with each tab containing user-defined modules.