Colouroku vs Flex Sudoku
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Colouroku
This game offers a unique twist on Sudoku, allowing players to solve puzzles using colors, numbers, or even animals. With seven difficulty levels, games can range from quick 30-second challenges to more involved 30-minute sessions.
- Color-based Sudoku puzzles
- Number-based Sudoku puzzles
- Animal-themed puzzles
- Seven difficulty levels
- Variable game length
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Colouroku is sudoku with colors. Or numbers. Or both. Or animals. Seven levels of difficulty allow for games that last from 30 seconds to 30 minutes.
Flex Sudoku
Engage with challenging Sudoku puzzles of various sizes, from classic 9x9 to larger 16x16 and 25x25 grids. Load pre-made games, create your own, and utilize a built-in solver and note-taking features to enhance your solving experience.
- Multiple Sudoku grid sizes (4x4 to 25x25)
- Load thousands of built-in games
- Enter and solve your own games
- Adjustable difficulty levels
- Built-in Sudoku solver
- Note-taking and hint system
- Track game statistics
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Challenge yourself by playing more complex version of sudoku. You can try the classic 9x9, or more complex 16x16 or 25x25. You can even try 4x4 version for fun. Here is what you can do with the game: 1. Play classic, 16x16, 25x25 or 4x4 size sudoku game. 2. Play by loading thousands of built in games or enter your own game. 3. Choose the degree of difficulty of these games. 4. A sudoku solver is built in and can be used for solving any game you are playing. 5. Enter Notes while solving the game or using mutliple levels of hints to help you with the game. 6. Keep track of number of games played, minimum, maximum and average time to complete the game.
Screenshots
Verdict
The clearest difference is review sentiment: Flex Sudoku at 50% against Colouroku's 0%. Flex Sudoku also leads on price (Free vs $0.99) and update cadence (every 2 months vs every 6 months). Colouroku's advantage is rating (4.0 vs 3.1). On ads, in-app purchases, device support and iOS requirement 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
Flex Sudoku is free to download; Colouroku costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Colouroku holds the better App Store score, 4.0 against 3.1. That said, the two scores are not equally well evidenced: Flex Sudoku has 8 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 0% of Colouroku's written reviews are positive against 50% of Flex Sudoku's, so the app with the better star average is not the one people write more warmly about.
Colouroku ships an update every 6 months, Flex Sudoku every 2 months. The most recent releases landed on October 15, 2026 and October 24, 2026 respectively.
| Parameter | Colouroku | Flex Sudoku |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.0 (1 ratings) — better | 3.1 (8 ratings) |
| Positive reviews | 0.0% of reviews | 50.0% of reviews — better |
| Number of ratings | 1 | 8 — better |
| Update frequency | Every 6 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 — better | 15.4 |
| Further details — not scored | ||
| Size | 14 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Kelvin Sherlock | Jatinder Gogna |
Customer experience
Colouroku
Flex Sudoku
In-app purchases
Colouroku
No in-app purchases
Flex Sudoku
No in-app purchases
