The settings menu shows an option for Quick Add to be on or off. I can't find anywhere that describes what that is.
When "Quick add" is checked, a TD icon at the top left of your android status bar will show up. If you pull down the notification bar, you will see "Add Task" button, which pops up a dialog to add a new task.
It's the quickest way to add a new task when needed :)
Is there a way to hide the quick add icon from the notification bar (like Ticktick does)?
There is no way to do this at this time.
I believe that icons should only be displayed to indicate that a notification needs attention. You really should find a way to hide the icon while the Quick Add statusbar entry is enabled. I know this can be done on Android.
It would be great if you could make a way for us to hide the Quick Add. It's fine to see when we pull down the notification shade, so we can add a task, but not in the status bar. I didn't mind it so much before Lollipop, but I really do not want to see it on my lock screen. If you could make that happen that would be great. Thanks for all of your great work on Todoist.