What are some alternatives?
When comparing Reeder and Sismics Reader, you can also consider the following products
Feedly - The content you need to accelerate your research, marketing, and sales.
Winds - Open source & beautiful RSS reader
Inoreader - Dive into your favorite content. The content reader for power users who want to save time.
Feedlivery - One email every week with posts from the feeds you follow
Tiny Tiny RSS - Web-based news feed aggregator, designed to allow you to read news from any location, while feeling...
Feedbunch - A simple and elegant feed reader