I use labels as contexts, ie., @call or @home, so I need to be able to pull up a list by labels. But I can't seem to find this feature. Does it just not exist yet?
When you on the left pane where you see the list of projects, you can tap on the "labels" icon and you'll see all labels which you can search for by tapping on them.
Please make sure you're using the latest version 5.2 of our app: https://itunes.apple.com/us/app/todoist-to-do-list-task-list/id572688855