Comparison

Kingdom vs Ocean Chess

Price, ratings, monetisation and update history for both games, side by side โ€” with what reviewers say about each.

Head to head
About

Kingdom

Features
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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 +, โˆ’. No Repeats (if applicable): Avoid duplicate numbers in some grids. Use Logic: Think strategicallyโ€”each 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, itโ€™s great. Download now to start your Cross Math experience!

About

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

Kingdom4 screens
Ocean Chess4 screens

Verdict

The call

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

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.

UpkeepUpdate frequency

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.

Scorecard1 real difference ยท 5 level
Kingdom versus Ocean Chess: the parameters behind the verdict, then further details
ParameterKingdomOcean Chess
PriceFreeFree
Update frequencyEvery 2 monthsEvery 5 days โ€” better
AdsYesYes
In-app purchasesYesYes
DevicesiPhone, iPodiPhone, iPad, iPod โ€” better
Requires iOS15.015.0
Further details โ€” not scored
Size137 MB129 MB
Age rating4+4+
DeveloperTidi Holding StdTheodor Norenberg

In-app purchases

18 purchases

Kingdom

One-time18
  • Auto claim 3 days$0.99
  • Coin Pack Small$0.99
  • Pouch of Coin$0.99
Show 15 more
  • 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
6 purchases

Ocean Chess

One-time6
  • 500 Coins$0.99
  • 1200 Coins$1.99
  • No Ads$2.99
Show 3 more
  • 2500 Coins$3.99
  • 6000 Coins$7.99
  • 25000 Coins$29.99

Questions

Is Kingdom free?
Kingdom is free to download, with in-app purchases available.
Is Ocean Chess free?
Ocean Chess is free to download, with in-app purchases available.
Do Kingdom or Ocean Chess have ads?
Both Kingdom and Ocean Chess show ads.
Which is updated more often, Kingdom or Ocean Chess?
Kingdom ships an update every 2 months, and Ocean Chess every 5 days. Most recently, Kingdom was updated on October 28, 2026 and Ocean Chess on October 25, 2026.

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