Need to talk with a friend but don't want to waste precious time on Facebook? This nifty app can alert you when they sign on. Facebook Online Notifications works well overall, but you may find it to be a drain on your battery.
In our tests, it seemed like the app was only able to tell if someone was online if they had their chat on. While most Facebook users leave it on by default, you'll still have some who have it turned off, so you could miss some of your circle when they get on the site. … Read more