Martijn
I just put the Sublevel on my homescreen, works pretty well for me. Though I take care of notifications through IFTTT to stay up-to-date. I have never felt like I really need a separate app. What functionality are you missing?
Martijn
ifttt.com can be used to get notifications of RSS updates. So mine is configured to notify me of replies and mentions through the RSS feeds that Sublevel offers. You can get the RSS links on the @developer page.