CrossMath vs Peng Doku!
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
CrossMath
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Ready to put your math skills and deductive logic to the ultimate test? Welcome to CrossMath: DogDoku Puzzle – the premier math crossword puzzle game designed to sharpen your mental arithmetic, boost problem-solving speed, and deliver satisfying brain workouts every single day! MASTER THE ART OF CROSSMATH CrossMath takes classic crossword grids and supercharges them with numbers and math operations. Instead of reading word clues, every row and column forms an interlocking math equation. • Balance the Equations: Use addition, subtraction, multiplication, and division to complete each line. • Follow Order of Operations: Keep BODMAS/PEMDAS rules in mind—multiplication and division always calculate first! • Crossword Intersections: Every number you place impacts both horizontal and vertical equations simultaneously. • Deduce, Don't Guess: Work through the board step by step with pure logic and strategic planning. DOGDOKU MODE Want a fun change of pace between math sessions? Jump right into DogDoku whenever you want—fully unlocked and available from day one! • Spatial Deduction Fun: A delightful fusion of Sudoku and grid-based logic. • Place the Puppies: Figure out where each cute dog belongs across distinct colored sectors. • Keep Personal Space: Ensure dogs never touch each other—not even diagonally! • Switch Seamlessly: Alternate between numbers and puppies with just one tap on the home screen. KEY HIGHLIGHTS • Comprehensive Mental Workout: Strengthen calculation speed, focus, and logical reasoning with every grid. • Multiple Difficulty Tiers: Start on Easy to warm up, then conquer Medium, Hard, and Expert boards built for calculation masters. • Daily Challenges: Fresh math puzzles every day to maintain your streak and keep your brain sharp. • Clean & Minimalist Design: Clutter-free interface built for fast, smooth, and distraction-free tap-and-play input. • Pure Focus, No Timers: Relax and play entirely at your own pace without ticking clocks or sudden game-overs. Train your brain, conquer the equations, and enjoy cozy logic puzzles! Download CrossMath: DogDoku Puzzle today and experience the ultimate math crossword challenge!
Peng Doku!
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Peng Doku! – Relax & Clear Your Mind Overwhelmed by trivial daily chores and mental blockages? Unwind and reset your mind with Peng Doku!, a premium puzzle game blending Sudoku deduction and Minesweeper-style reasoning for seamless, unified gameplay. Core Goal of Every Round Divide exclusive independent territories for every penguin on the board. Simple Rules, Rich Strategies Easy to pick up yet full of deep tactical layers: Zoned Grid: The board is split into distinct colored zones, each holding exactly one penguin. Territory Restrictions: No two penguins can share a row or column, nor sit adjacent vertically, horizontally or diagonally. Precise Deduction Mechanic: Double-tap a cell to place a penguin marker. You start each game with 3 retry chances tracked by heart icons. Careful placement delivers satisfying puzzle-solving rewards, while wrong moves consume one retry. Avoid blind guesses—every placement calls for rigorous deduction. Game Highlights Immersive focused puzzle experience Clean, distraction-free gameplay to fully immerse you in thoughtful reasoning Perfect for fragmented spare time: play during commutes, waiting lines and idle moments New puzzles refresh daily to continuously sharpen your thinking skills. Long-Lasting Replay Value No repetitive tedious tasks or intrusive social features—clever puzzle design keeps players engaged long-term. The minimalist, tidy visuals paired with responsive touch controls let you master basic mechanics in seconds. Every solved puzzle leaves you lingering over its layered reasoning long after playing. If you love penguin-themed deduction puzzles, try Peng Doku! right away. Hone your thinking and become a master of this charming brain teaser!
Screenshots
Verdict
CrossMath and Peng Doku! are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | CrossMath | Peng Doku! |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly | — |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 146 MB | 11 MB |
| Age rating | 4+ | 17+ |
| Developer | Luong Phuc Thien | 燕梅 高 |
In-app purchases
CrossMath
No in-app purchases
Peng Doku!
No in-app purchases









