Nextgen Reader, one of the popular RSS readers for Windows Phone devices just got updated to v6.5 with sharing improvements. It already supports full offline mode with image caching, support for Readability and Instapaper, and more.
• Fixed crash issues on Windows 10 Mobile build 10136.
• Set favorite contacts and share articles quickly via email. Tap the three dots next to email.
• Share links via WhatsApp.
• Please go to app settings -> accounts to enable WhatsApp.
• Many other improvements and bug fixes.
Download Nextgen Reader from Windows Phone Store for $0.99 with free trial available. Find it here from Windows Phone Store.