Killer Sudoku CTC in IOS

by Cracking the Cryptic

Walkthrough, Guilds, Tips on this special game

Our Expert Score

94/100

Killer Sudoku by Cracking the Cryptic is arguably the gold standard for Sudoku apps. Based on the incredibly popular YouTube channel, this app features hand-crafted puzzles that are far superior to the randomly generated grids found in cheaper apps. Each level is a work of art, designed to lead you through a specific logical journey that feels more like solving a mystery than doing math.

The 'Killer' variant adds 'cages' that must sum up to a specific number, adding a layer of arithmetic to the classic Sudoku rules. The UI is clearly built by people who play Sudoku seriously; the note-taking tools are intuitive, and the 'color' highlighting allows for advanced strategies like 'Snyder notation' or 'coloring.' It’s a challenging, premium experience that respects the player's intelligence and offers hours of deep, satisfying mental exercise.

Dinsun reviewed on: Thu Feb 26 2026

The Game

Available on: iPhone, iPad, iPod

Version 1.2Tue Apr 05 2022

- 40 new puzzles

- 15 bonus beginner puzzles

All 100(+) puzzles are out now, thank you for playing Killer Sudoku!


***** APRIL UPDATE *****

40 new standard puzzles + 15 bonus beginner puzzles

-------------------------------------

Presented by Cracking The Cryptic, YouTube’s most popular Sudoku channel, comes a new game based on our most requested variant: Killer Sudoku.

In Killer Sudoku, every puzzle features cages that tell you the sum of the numbers inside. This extra information leads to beautiful logic that you will master as you progress through our handmade puzzles. The puzzles in Killer Sudoku are created by Simon and Mark as well as a large number of guest creators. Fans of Cracking the Cryptic's YouTube channel will recognize many of these authors as some of the most talented creators working today!

As with our other games (‘Classic Sudoku’, ‘Sandwich Sudoku’, ‘Chess Sudoku’, 'Thermo Sudoku' and 'Miracle Sudoku'), Simon Anthony and Mark Goodliffe (the hosts of Cracking The Cryptic) have written all the hints for the puzzles. So you know that every puzzle has been play-tested by a human being to ensure that each sudoku is interesting and fun to solve.

In Cracking The Cryptic’s games, players start with zero stars and earn stars by solving puzzles. The more puzzles you solve, the more stars you earn and the more puzzles you get to play. Only the most dedicated (and cleverest) sudoku players will finish all the puzzles. Of course the difficulty is carefully calibrated to ensure lots of puzzles at every level (from easy through to extreme). Anyone familiar with their YouTube channel will know that Simon and Mark take pride in teaching viewers to be better solvers and, in these games, they always craft the puzzles with the mindset of trying to help solvers improve their skills.

Mark and Simon have both represented the UK many times at the World Sudoku Championship and you can find more of their puzzles (and lots of others) on the internet’s biggest sudoku channel Cracking The Cryptic.

Features:

100 beautiful puzzles

15 bonus beginner puzzles

Hints crafted by Simon and Mark!


Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.

***** APRIL UPDATE *****

40 new standard puzzles + 15 bonus beginner puzzles

-------------------------------------

Presented by Cracking The Cryptic, YouTube’s most popular Sudoku channel, comes a new game based on our most requested variant: Killer Sudoku.

In Killer Sudoku, every puzzle features cages that tell you the sum of the numbers inside. This extra information leads to beautiful logic that you will master as you progress through our handmade puzzles. The puzzles in Killer Sudoku are created by Simon and Mark as well as a large number of guest creators. Fans of Cracking the Cryptic's YouTube channel will recognize many of these authors as some of the most talented creators working today!

As with our other games (‘Classic Sudoku’, ‘Sandwich Sudoku’, ‘Chess Sudoku’, 'Thermo Sudoku' and 'Miracle Sudoku'), Simon Anthony and Mark Goodliffe (the hosts of Cracking The Cryptic) have written all the hints for the puzzles. So you know that every puzzle has been play-tested by a human being to ensure that each sudoku is interesting and fun to solve.

In Cracking The Cryptic’s games, players start with zero stars and earn stars by solving puzzles. The more puzzles you solve, the more stars you earn and the more puzzles you get to play. Only the most dedicated (and cleverest) sudoku players will finish all the puzzles. Of course the difficulty is carefully calibrated to ensure lots of puzzles at every level (from easy through to extreme). Anyone familiar with their YouTube channel will know that Simon and Mark take pride in teaching viewers to be better solvers and, in these games, they always craft the puzzles with the mindset of trying to help solvers improve their skills.

Mark and Simon have both represented the UK many times at the World Sudoku Championship and you can find more of their puzzles (and lots of others) on the internet’s biggest sudoku channel Cracking The Cryptic.

Features:

100 beautiful puzzles

15 bonus beginner puzzles

Hints crafted by Simon and Mark!


Ratings & Reviews

4.6 out of 5 with 76 Counts
Age Rating 4+

Screenshots

Killer Sudoku CTC screenshot 1Killer Sudoku CTC screenshot 2Killer Sudoku CTC screenshot 3Killer Sudoku CTC screenshot 4Killer Sudoku CTC screenshot 5Killer Sudoku CTC screenshot 6

Presented by Mark Goodliffe and Simon Anthony, the hosts of Cracking the Cryptic, this app brings you the very best Killer Sudoku puzzles. Unlike computer-generated apps, every puzzle here has been hand-selected and tested to ensure a logical and rewarding solving experience. Use advanced note-taking tools and hint systems designed to teach you how to become a better solver.

Features

1

100+ hand-crafted levels

2

No computer-generated 'filler' puzzles

3

Hint system that explains the logic

4

Beautiful, clean interface

Tips

Gameplays

Q&A

The puzzles range from 'Easy' to 'Diabolical,' so there is something for everyone, but it leans toward those who enjoy a real challenge.

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