Kingdom vs Ocean Chess
Price, ratings, monetisation and update history for both games, side by side โ with what reviewers say about each.
Kingdom
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Dive into Cross Math 2D, a fun math puzzle game blending crossword and arithmetic! Solve clever number puzzles by filling a 2D grid with digits and operators to complete equations across rows and columns. Enjoy hundreds of levels, from beginner to expert, with daily brain teasers, helpful hints, and global leaderboards. Experience an educational math adventure with a fresh twist on classic puzzles. How to Play Cross Math 2D: Fill the Grid: Input numbers to solve math equations. Solve Both Ways: Complete equations horizontally and vertically. Follow Math Rules: Use order of operations: ร, รท before +, โ. No Repeats (if applicable): Avoid duplicate numbers in some grids. Use Logic: Think strategicallyโeach number impacts multiple lines. Finish the Puzzle: Fill all boxes correctly to advance. Track Your Progress: Play daily for rewards and streaks! Key Features Choose Your Level: Start easy, progress at your pace. Save Your Progress: Maintain daily wins and test yourself. Unlock New Worlds: Complete levels to explore new math areas. Complete Tasks: Earn rewards with daily and special missions. Brain Training: Enhance logic, arithmetic, and problem-solving skills. Perfect for all ages, Cross Math 2D offers an educational puzzle game blending fun and learning. Whether you want a quick math brain teaser or a full puzzle journey, itโs great. Download now to start your Cross Math experience!
Ocean Chess
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Think you know chess? Think again. Ocean Chess takes chess puzzles to a whole new level with boards that break all the rules. Teleport your pieces across the board, step on a transformation tile to become a queen, and watch out for deadly traps! 300 hand-crafted puzzles. One forced solution each. No luck, no guessing โ just pure chess logic pushed to its limits. When normal chess feels too easy, try Blindfold mode โ memorize the board before it disappears, then solve it from memory. Or race the clock in Time Trial and see how fast you can think. Every puzzle is a new challenge. Every solution is satisfying. Are you smart enough to solve them all?
Screenshots
Verdict
The clearest difference is update cadence: Ocean Chess at every 5 days against Kingdom's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Kingdom sells 18 one-off in-app purchases and Ocean Chess sells 6 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Kingdom ships an update every 2 months, Ocean Chess every 5 days. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.
| Parameter | Kingdom | Ocean Chess |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 5 days โ better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPod | iPhone, iPad, iPod โ better |
| Requires iOS | 15.0 | 15.0 |
| Further details โ not scored | ||
| Size | 137 MB | 129 MB |
| Age rating | 4+ | 4+ |
| Developer | Tidi Holding Std | Theodor Norenberg |
In-app purchases
Kingdom
- Auto claim 3 days$0.99
- Coin Pack Small$0.99
- Pouch of Coin$0.99
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- Ads Break$1.99
- Starter Pack$1.99
- Jungle Delight$2.99
- Rocky Trial$2.99
- Coin Pack Medium$2.99
- Auto claim 30 days$3.99
- Coin Pack Large$4.99
- Sack of Coin$4.99
- Unicorn Land$5.99
- Kingdom Pass$6.99
- Weekly Pack$6.99
- Chest of Coin$9.99
- Monthly Pack$24.99
- Vault of Coin$49.99
- Hoard of Coin$99.99
Ocean Chess
- 500 Coins$0.99
- 1200 Coins$1.99
- No Ads$2.99
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- 2500 Coins$3.99
- 6000 Coins$7.99
- 25000 Coins$29.99









