New to Sudoku? A short lesson now walks you through it, and How to play in Settings brings it back any time. You can also play three Easy puzzles before you unlock the full game.

MoonDoku FM sounds better: Downtempo has six new tracks and now plays on from one song to the next. And every track now plays at the same volume.

Faster and lighter: MoonDoku opens sooner, moves between the home screen and a puzzle more smoothly, and is easier on your battery while you play.

Hints now show why: one line on why the square takes its number, with the numbers that prove it ringed on the board. Also in this update: • A board's first mistake gets one short line explaining what went wrong. • Smaller iPhones fit better, including an iPhone SE with Display Zoom turned on. • The ambience sounds are evened out, so no one loop drowns out the others. • Plus smaller fixes, like the Nightly's date no longer getting cut off.

Mistakes never end a board any more. A wrong number still clears itself, and on the Nightly it adds 30 seconds to your time. Also in this update: • On iPad, the cat now stands on top of the board while you play, and an iPad on its side gets a 3×3 number pad. • On your second day with a solve, MoonDoku may ask you for a rating. You can also rate it any time in Settings. • Plus smoother animation, faster loading and smaller fixes.

MoonDoku now speaks Korean and Japanese. Also in this update: • The cat comes into the game with you. On iPhone she stands on top of the board while you play, and reacts when a number is wrong. Tap to pet her, or press and hold to change her coat. • Hint now asks before it spends one, so a stray tap can't cost you. • The note that explains your first wrong number now sits at the far edge of the board, clear of the squares it points to. • A tap just outside the board now picks the edge square you were aiming for. • Plus smaller fixes.

MoonDoku now speaks Brazilian Portuguese, and it follows the language iOS picks for it from your whole list of preferred languages. Also in this update: • Ginkgo Moon, a tenth world: golden leaves drifting over a moonlit lake. • The cat purrs when you pet her, answers each pat a little differently, and has small moments of her own. • In tonight's last hour, the Nightly card shows how much of the night is left. Once you've solved it, it shows when the next one arrives. • Plus smaller fixes.

A small fix for “Your sky”: the count of stars and constellations now has a line of its own, and in German, Spanish and Chinese each number stays with its word.

MoonDoku now speaks German, Spanish and Simplified Chinese. It follows your device's language, or you can pick one just for MoonDoku in Settings. Also in this update: • The first wrong number on a board now tells you why it doesn't fit. • Last night's unfinished Nightly waits for you on the home screen, and a board you finish after midnight still counts for its own night. • The cat has more ways to answer when the world outside her window changes. • Plus smaller fixes.