There are four puzzle library levels corresponding to the four levels of strategies described in the Fundamentals. Within each level, "stars" are used to indicate difficulty.
Puzzles can also be imported or created.
In all cases, a Grader optionally displays abbreviations beneath the puzzle indicating the strategies needed to solve that puzzle, along with other statistics
A toolkit of visual aids is available at each of the four levels, ranging from none at the Basic level to several at the Extreme level.
If you don't like looking at puzzles where all empty cells are filled with possible solutions, then pick Newspaper Mode. In this mode, puzzles given to you are the ones best suited for this solution mode. You will find that the visual aids provided make even higher level puzzles very solvable in this mode.
The Grader Statistics give you a good idea of whether you are going to like solving a puzzle or not.
You can create a puzzle having a particular library and star level. Several puzzles are created and graded each second. The Grader statistics are displayed for what is considered to be the best of a batch for your selection, and you can be looking at them while the next batch is being created.
A protected area can be specified which Create avoids, producing a puzzle having a specific pattern. You can do this when creating a puzzle for a specific target level, but the "no target" option is more likely to be successful for restrictive patterns.
"Newspaper Mode" option:
If this new option is selected, the solutions possible in each empty cell are not given to you. Previously, without this option, you were given these solutions for all levels higher than Basic.
This option can be set from the main Menu, since it affects just about every action in the Menu, including which puzzle you are given to solve, how puzzles are created, and how puzzles are graded.
If you click on the Developer Website, you will see how the example shown in these screenshots is solved in Newspaper mode, following the steps that the Grader took. (The Grader solves a puzzle the same way it assumes a human would solve the puzzle.) This is also a good place to leave any comments or suggestions, as well as to report problems.
Change in Moderate strategies and visual aids:
Line-Block Intersections are now considered Moderate strategies. The existing visual aid that lets you highlight a particular possible solution is now available at this level.
The visual aid that highlights all cells containg a pair now lets you show only pair cells that have a possible in common with a selected pair cell.
Creation of puzzles improved:
Creation is now done in batches. You are a shown the puzzle and its Grader statistics of the best of a batch while the next batch of puzzles is being created.
Creation of a puzzle to fit a given pattern is also improved.
With Family Sharing set up, up to six family members can use this app.