Thermo Sudoku 4+

by Cracking the Cryptic

Nick Carney

Designed for iPad

    • $4.99



***** MARCH UPDATE *****
20 new puzzles, 100 puzzles total!


Presented by Cracking The Cryptic, YouTube’s most popular Sudoku channel, comes a new game featuring one of the most popular puzzle types: Thermo Sudoku.

How does Thermo Sudoku work? Well each sudoku grid contains thermometer shapes (often drawn to create themes) and digits on thermometers must increase as one moves further from the bulb end. The interactions between the thermometers leads to new logical ideas and patterns that completely refreshes the standard sudoku solving experience.

As with their other games (‘Classic Sudoku’, ‘Sandwich Sudoku’ and ‘Chess Sudoku’), Simon Anthony and Mark Goodliffe (the hosts of Cracking The Cryptic) have personally crafted the hints for the puzzles. So you know that every puzzle has been play-tested by a human being to ensure that the 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.

100 beautiful puzzles
Hints crafted by Simon and Mark!

What’s New

Version 1.4

20 new puzzles, 100 puzzles total!

Ratings and Reviews

4.8 out of 5
144 Ratings

144 Ratings

SkyMarie123 ,

Absolutely My Favorite App

I love this app so much. I check almost daily for an update. Thermometer Sudoku is definitely my favorite variation and I cannot get enough of it! Update day is always highly anticipated.
Every Cracking the Cryptic app is wonderful. I own all 4 and have completed every puzzle published on each to date, but in my heart none of them can compete with Thermo. I find myself frequently going back to already solved puzzles to solve them again.
I also really love that the hints don’t just fill in a number but rather explain the logic behind each move so you can learn to solve it.
The latest update had the most beautiful puzzles yet. They were truly breathtaking and gorgeous to solve.
All my love to Mark, Simon, and the team behind this app. All parties involved are breathtakingly talented.

Kyle J. Weston ,

Fantastic App

Incredible app. Full of beautiful puzzles, and you can tell each one is hand crafted to follow a logical path. The hints are well written too, giving you just enough to get back on track, but not spoiling too much and allowing you to feel like you’ve still cracked a tough one! Input method is very well designed as well, and I have very large fingers, so that’s always an issue.

mansdad ,

Too hard

I really enjoy doing sudoku on this software, and I enjoy the Thermo puzzles, up to the point where they get too hard. Puzzle #79 is ridiculously hard. I got as far as could, starting looking at hints and could not get past the fourth hint, i understand what it’s trying to say but it doesn’t fit the puzzle and no progress can be made from this hint unless you just take it on faith you should remove the candidates it says to. I think if people want super hard puzzles they can find them on their own, no need to include such convoluted logic in a mass marketed app. I have had this trouble with other cracking the cryptic apps too, the last few puzzles are just stupid hard and make me wanna shoot myself in the head

App Privacy

The developer, Nick Carney, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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