Cracking the Cryptic vs Cirdoku
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Cracking the Cryptic
This app offers a curated collection of handcrafted Sudoku puzzles from world-renowned constructors. Explore classic and unique variants, with new puzzle packs released regularly. A free introductory pack is included with download.
- Handcrafted Sudoku puzzles
- Curated by expert constructors
- Classic and unique variants
- Regularly released puzzle packs
- Free introductory puzzle pack
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OUR NEWEST PACK – CLASSIC VOLUME #2! Classic sudoku is where it all began, and there is still lots of skill to be deployed to solve classic puzzles, and new techniques to be explored. Nikoli, the Japanese puzzle house, named and popularised sudoku from 1984, and we have commissioned 20 puzzles from them for this Classic Sudoku 2 app. We have also created 20 ourselves, and sourced 20 more from Sam Cappleman-Lynes, the brilliant British sudoku expert. The result is a wonderful 60-puzzle pack which will delight and challenge you. -------------------- Welcome to the brand new Sudoku app from the most popular Sudoku channel, Cracking The Cryptic. Unlike other Sudoku apps, we feature handcrafted and curated puzzles from the world’s best Sudoku constructors. Each collection features puzzles made by various authors that are now familiar names to those who follow the channel. Authors like Phistomefel, Clover, Sam Cappleman-Lynes, Christoph Seeliger, Richard Stolk, jovi_al, Qodec, Prasanna Seshadri and of course, Simon and Mark! Downloading Cracking the Cryptic will give you access to our first free collection – a variety pack by Prasanna Seshadri featuring 7 puzzles inspired from our previous Sudoku apps; Sandwich, Classic, Chess, Thermo, Miracle, Killer and Arrow Sudoku. We also have purchasable packs designed for all skill levels and featuring many unique variants not seen previously. We’ll be releasing more free and paid packs in the future so keep an eye on the app for more Sudoku content from Cracking The Cryptic!
Cirdoku
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Cirdoku is Sudoku, reimagined on a circular grid. Instead of a square board, you work with concentric rings divided into radial sectors. Place the numbers so that no digit repeats within any ring or any sector. The logic is the same. The shape changes everything. HOW IT WORKS • Classic boards use 4 concentric rings x 8 sectors, 32 cells to fill • Each ring must contain all its numbers, with no repeats • Each sector must contain all its numbers, with no repeats • Find the one arrangement that satisfies every constraint at once SIX WAYS TO PLAY • Classic: the pure circular Sudoku puzzle • Daily Challenge: a new themed board every day, with its own twist and difficulty • Hue: the same puzzle with no numbers at all, solved entirely by color • Dial: drag whole rings to spin them and match par, scored by turns and medals • Journey: work through a progressing series of boards • Endless Mode: keep playing, with a new puzzle every time you solve one FEATURES • Fixed boards on every campaign level, so every player meets the same puzzle • Built-in Hint system: get unstuck without breaking immersion • Notes, mistake tracking and restart on any board • Fractal Zoom win animation: a satisfying reward for completing a puzzle • Clean, distraction-free interface with smooth circular interactions WHY CIRDOKU? The circular format isn't just a gimmick. It fundamentally changes how you scan for conflicts and build chains of deduction. Patterns that were automatic in square Sudoku need to be relearned. It's a fresh challenge even for experienced puzzlers. PLAY WITHOUT PRESSURE Play with three hints per board. Cirdoku Plus is an optional one-time purchase for unlimited hints. Restore purchases is available. No ads, no subscription. If you've mastered square Sudoku and want something that feels genuinely new, Cirdoku is your next step.
Screenshots
Verdict
The clearest difference is update cadence: Cirdoku at every 9 days against Cracking the Cryptic's every 3 weeks. Cracking the Cryptic's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Cracking the Cryptic sells 13 one-off in-app purchases and Cirdoku sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Cracking the Cryptic ships an update every 3 weeks, Cirdoku every 9 days. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.
| Parameter | Cracking the Cryptic | Cirdoku |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (210 ratings) — better | — |
| Positive reviews | 72.1% of reviews | — |
| Number of ratings | 210 — better | — |
| Update frequency | Every 3 weeks | Every 9 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 234 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Nick Carney | Gustavo cesar Sola Barreto Marcelino |
Bugs and requests
Cracking the Cryptic
Reported bugs
4 issues- Puzzle progress and purchases disappearing after updates
- Incorrect rules or hints in certain puzzles
- Crashes and freezes, especially on older devices or Macs
- Inconsistent behavior when switching between portrait and landscape modes
Requested features
5 requests- Add more color options for pencil marking and highlighting
- Implement a way to clear progress or start puzzles from scratch
- Integrate all CTC apps into a single app for better organization
- Add keyboard support, especially on Mac
- Improve the quality and clarity of hints
Cirdoku
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Cracking the Cryptic
- CTC Worms - James Sinclair$0.99
- CTC Worms - Marty Sears$0.99
- CTC Worms - Zetamath$1.99
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- CTC Worms - Blobz$1.99
- CTC Worms - Michael Lefkowitz$1.99
- CTC Worms - Phistomefel$1.99
- GAS Volume #1$2.99
- GAS Volume #2$2.99
- CTC Approachable Sudoku #1$2.99
- Domino Sudoku Pack$4.99
- Lines Variety Pack$4.99
- Classic Volume #2$4.99
- CTC Fog Pack #1$4.99
Cirdoku
- Cirdoku Plus$2.99
Questions
Is Cracking the Cryptic free?
Is Cirdoku free?
Do Cracking the Cryptic or Cirdoku have ads?
Which is updated more often, Cracking the Cryptic or Cirdoku?
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