Comparison

BiDoku vs Hidden Chess

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

Head to head
About

BiDoku

This logic puzzle game challenges you to fill a grid with 0s and 1s. Convert binary numbers to decimal and match row/column targets using pure logic. It offers a fresh twist on number puzzles for those who enjoy brain teasers.

Highlights
  • Binary number puzzles
  • Grid deduction gameplay
  • Multiple difficulty levels
  • Helper modes
  • Smart hint system
  • Best time tracking
  • Hard mode with grouped targets
Features
Read full description

BiDoku: Think in Binary Welcome to BiDoku, a unique logic puzzle game where binary numbers meet brain-teasing strategy. Fill the grid with 0s and 1s, convert binary into decimal, and match row and column targets using pure logic. Every move matters. Every puzzle has a single solution. If you love Sudoku, number puzzles, or brain challenges, BiDoku offers a completely fresh twist. How It Works Each row and column represents a binary number. Your goal: - Place 0s and 1s in the grid - Match the decimal targets - Use logical deduction to solve the puzzle - Complete the grid perfectly to win Simple rules. Deep strategy. Features • Multiple difficulty levels • Clean and modern design • Optional helper modes • Dynamic target tracking • Smart hint system • Track your best times • Hard mode with grouped targets for advanced players • Designed for both beginners and logic masters Train Your Brain BiDoku improves: - Logical reasoning - Binary number understanding - Pattern recognition - Strategic thinking It’s perfect for puzzle fans, math enthusiasts, students learning binary, or anyone who loves a smart mental workout. Why BiDoku? Unlike traditional number puzzles, BiDoku blends: -Binary logic -Mathematical thinking -Classic grid deduction The result is a fresh, satisfying, and addictive puzzle experience. Think in 0s and 1s. Master binary logic. Challenge your mind. Download BiDoku and start solving today.

About

Hidden Chess

Features
Read full description

Hidden Chess: Shadow Chess reinvents traditional chess with a unique hidden-piece system that turns every match into a battle of strategy, memory, and deduction. Unlike classic chess, most pieces begin the game hidden. Their identities remain unknown until they make their first move. Combined with randomized starting positions, every match becomes an unpredictable challenge where adaptation matters more than memorized openings. A New Chess Experience Traditional chess rewards preparation and opening knowledge. Hidden Chess rewards creativity, observation, and strategic thinking. Key Rules: • Most pieces start hidden • Pieces reveal themselves after moving • Randomized starting arrangements • Standard chess movement and capture rules • Every game offers a unique challenge Think Ahead, Adapt Faster Every move contains uncertainty. Is that hidden piece a powerful attacker or a harmless decoy? Should you take the risk or play safely? Success requires: • Strategic planning • Memory and observation • Tactical decision-making • Reading your opponent • Adapting to unexpected situations Game Features • Innovative hidden-piece chess gameplay • Play against AI opponents • Challenge real players • Fast and smooth controls • Clean and modern interface • Endless strategic possibilities Perfect For • Chess players seeking a fresh challenge • Fans of strategy and board games • Players who enjoy deduction and mind games • Anyone looking for a new chess experience Every piece hides a secret. Every move changes the board. Can you master the shadows?

Screenshots

BiDoku4 screens
Hidden Chess4 screens

Verdict

The call

The clearest difference is ads: BiDoku at none against Hidden Chess's shown. BiDoku also leads on update cadence (every 2 days vs monthly). Hidden Chess's advantage is iOS requirement (13.0 vs 26.0). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. BiDoku sells 1 one-off in-app purchase and Hidden Chess sells 7 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

BiDoku ships an update every 2 days, Hidden Chess monthly. The most recent releases landed on October 12, 2026 and October 5, 2026 respectively.

Scorecard3 real differences · 7 level
BiDoku versus Hidden Chess: the parameters behind the verdict, then further details
ParameterBiDokuHidden Chess
PriceFreeFree
Rating1.0 (1 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 2 days — betterMonthly
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS26.013.0 — better
Further details — not scored
Size32 MB207 MB
Age rating17++17
DeveloperJob SierkstraApollo Software Pte Ltd

In-app purchases

1 purchases

BiDoku

One-time1
  • BiDoku Premium$1.99
7 purchases

Hidden Chess

One-time7
  • Coin1$1.99
  • Coin2$2.99
  • Coin3$4.99
Show 4 more
  • Coin4$7.99
  • Coin5$11.99
  • Coin6$19.99
  • Coin7$29.99

Questions

Is BiDoku free?
BiDoku is free to download, with in-app purchases available.
Is Hidden Chess free?
Hidden Chess is free to download, with in-app purchases available.
Do BiDoku or Hidden Chess have ads?
Hidden Chess shows ads; BiDoku does not.
Which is updated more often, BiDoku or Hidden Chess?
BiDoku ships an update every 2 days, and Hidden Chess monthly. Most recently, BiDoku was updated on October 12, 2026 and Hidden Chess on October 5, 2026.

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