The new functionality is about your actions ordering. Usually, you place them by priority in the order you want to do.
Current sorting algorithm is as follows:
+ first actions are sorted by square: 1 -> 2 -> 3 -> 4 (or, color: blue -> red -> green -> orange);
+ next actions are separated into done / not done;
+ next they are sorted by explicit priority set: A -> B -> C -> D -> E -> F -> 'unset priority';
+ next they are sorted by goal - whichever goal was added first, its action come closer to the top;
This is how it has been working for long, just giving the details. Such system helps you manage your projects/actions by setting the natural order of the actions you want.
Now, when working on a set of related actions (usually, sub-actions of the same project or just a list of actions within a goal), what happened when you had just finished an action and checked it as done? You had to return to the goal, then again to the list of actions to see what action to do next? That required enough extra clicking to make you tired :).
So, we tried to enhance this process, first, by letting you go straight to the next action from the goal page - you could click on the Progress bar (where the Do the next text is) and it would take you to the first action in the list of actions. If you wanted to see the whole list of actions, you just needed to click on the 'Action(s): 5 (view)' label.
Further improving this functionality, we've added the 'Next Action' notion to the Action page:
Your next action is usually the action that comes next on the list at the same level - next undone action of the same goal as current's, or next undone action for the same parent as current's. Habits will check what is next and will lead you there.
The next action feature will feel so natural to you, once tried, that you'll think you needed it all the time. I know it may sound a bit over-confident, but it is how we feel after using it ourselves :).
We've also added the sliding navigation menu to the main program pages. Using it you can quickly go to the Home page, the Notes or the Add Note pages. It will further be enhanced and more shortcuts will be added. The menu is triggered by clicking on the app icon in the top-left corner on those pages (the so-called home button on the action bar)
Finally, we want to thank you for all the feedback you give us, the reports, letters you send, posts you write - they are invaluable! Thanks to them we can quickly fix the problems, just as we did with this Next action early release - thanks to the error report we received! And we greatly appreciate your ratings on the play store, too!