Comparison

Flat Cube vs Kromium

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

Head to head
About

Flat Cube

This 2D puzzle game challenges players to strategically slide colored tiles to match designated areas. It offers multiple difficulty levels and daily challenges, encouraging players to optimize their moves and improve cognitive skills.

Highlights
  • Intuitive 2D cube puzzle gameplay
  • Four colored tiles with a locking system
  • Slide optimization challenges
  • Five difficulty levels (4x4 to 12x12)
  • Daily cube challenges
  • Achievements and badge system
  • Improves spatial awareness and cognitive skills
Features
Read full description

Flat Cube is a brain cube game designed with an intuitive and simple 2D approach, unlike complex 3D cube puzzles. While easy to pick up, it requires strategic thinking due to limited space and cube tile counts. Solve the cube puzzle within the recommended slide count to experience the ultimate sense of achievement. Key Features 1. Simple but Strategic 2D Cube Puzzle Experience deep cube puzzle gameplay without complicated 3D controls. The intuitive cube design allows anyone to enjoy the game easily. 2. Four Colored Cube Tiles with a Locking System Place cube tiles in the correct color areas. Correctly placed tiles lock in place, letting you focus on the remaining cubes. For a tougher challenge, you can disable the locking system. 3. Brain Cube Game Focused on Slide Optimization Each cube puzzle has a recommended slide count. Challenge yourself to achieve a perfect clear within this limit, enhancing your problem-solving skills by planning optimal moves. 4. Five Difficulty Levels - Easy (4x4 Cube): Perfect for beginners - Normal (6x6 Cube): Balanced challenge and fun - Hard (8x8 Cube): Requires strategic cube-solving skills - Master (10x10 Cube): High-level puzzles for skilled players - Legend (12x12 Cube): The ultimate challenge for true cube masters 5. Daily Cube Challenges A new cube puzzle is available every day in daily challenge mode, offering continuous fun and special rewards. 6. Achievements and Badge System Earn badges by achieving perfect clears and consecutive successes. Compete with friends and showcase your cube-solving accomplishments. 7. Improve Spatial Awareness and Cognitive Skills Strategically arrange cube tiles to naturally boost spatial perception and problem-solving abilities. Experience the joy of perfect solutions with Flat Cube, where simple rules meet strategic depth.

About

Kromium

Experience a satisfying color puzzle game with intuitive drag-and-drop mechanics and mesmerizing flood-fill animations. Complete hundreds of handcrafted levels with progressive difficulty, designed for both quick breaks and extended play.

Highlights
  • Intuitive drag-and-drop gameplay
  • Mesmerizing flood-fill mechanics
  • Hundreds of handcrafted levels
  • Progressive difficulty modes
  • Offline play
  • Star rating system
Features
Read full description

Kromium - Where Colors Come to Life Experience the most satisfying color puzzle on the App Store! Kromium combines intuitive drag-and-drop gameplay with mesmerizing flood-fill mechanics that create beautiful cascading color animations across your screen. HOW TO PLAY KROMIUM: Drag any tile to an adjacent tile Watch colors flood across connected areas in stunning waves Transform the entire grid to match the target color Complete levels within the move limit Earn up to 3 stars for efficient solutions WHAT MAKES KROMIUM SPECIAL: Unique Flood-Fill Mechanics - Watch colors spread like liquid paint Mesmerizing Animations - Every move creates beautiful color cascades Strategic Depth - Simple rules, complex puzzles Progressive Difficulty - From relaxing to mind-bending challenges Perfect One-Handed Play - Designed for mobile-first gaming No Time Pressure - Think, strategize, enjoy at your own pace KROMIUM FEATURES: Hundreds of handcrafted puzzle levels Multiple difficulty modes: Easy, Normal, Hard, and Nightmare Dynamic difficulty system that adapts to your skill Star rating system rewards strategic thinking Watch video ads for extra moves when you need them Offline play - no internet required VISUAL EXPERIENCE: Smooth, fluid animations that respond to your touch Rich, vibrant color palette Clean, modern interface design Portrait mode optimized for comfortable play Responsive design for all iPhone and iPad sizes PERFECT FOR: Quick 2-minute brain breaks Extended puzzle sessions Commuting and travel entertainment Relaxing wind-down activity Sharpening strategic thinking skills Players of all ages and skill levels Whether you're a casual gamer seeking beautiful, relaxing entertainment or a puzzle enthusiast looking for your next strategic challenge, Kromium delivers a premium gaming experience that's both instantly accessible and endlessly engaging. The name says it all - Kromium brings the full spectrum of color puzzle gaming to your fingertips with unprecedented visual beauty and satisfying gameplay mechanics. Download Kromium today and discover why this isn't just another puzzle game - it's a work of interactive art! Completely free to play! Watch short video ads to get extra moves when you need them. This game was built with love for my wife Katie.

Screenshots

Flat Cube4 screens
Kromium3 screens

Verdict

The call

The clearest difference is in-app purchases: Kromium at none against Flat Cube's 1. Kromium also leads on ads (none vs shown). On price, rating, ratings volume and update cadence 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. Flat Cube sells 1 one-off in-app purchase. Kromium asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Flat Cube against 5.0 for Kromium. Both are backed by a comparable volume of ratings — 4 and 2 respectively.

UpkeepUpdate frequency

Flat Cube ships an update every 3 days, Kromium every 2 days. The most recent releases landed on September 7, 2026 and September 11, 2026 respectively.

Scorecard3 real differences · 7 level
Flat Cube versus Kromium: the parameters behind the verdict, then further details
ParameterFlat CubeKromium
PriceFreeFree
Rating5.0 (4 ratings)5.0 (2 ratings)
Positive reviews100.0% of reviews—
Number of ratings4 — better2
Update frequencyEvery 3 daysEvery 2 days — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better14.0
Further details — not scored
Size161 MB47 MB
Age rating4+4+
DeveloperRedev Inc.james gibbens

Customer experience

Flat Cube

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Kromium

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Flat Cube

One-time1
  • Get Premium$9.99
None

Kromium

No in-app purchases

Questions

Is Flat Cube free?
Flat Cube is free to download, with in-app purchases available.
Is Kromium free?
Kromium is free to download, with no in-app purchases.
Which has better reviews, Flat Cube or Kromium?
Flat Cube and Kromium are both rated 5.0 out of 5 on the App Store, from 4 and 2 ratings respectively.
Do Flat Cube or Kromium have ads?
Flat Cube shows ads; Kromium does not.
Which is updated more often, Flat Cube or Kromium?
Flat Cube ships an update every 3 days, and Kromium every 2 days. Most recently, Flat Cube was updated on September 7, 2026 and Kromium on September 11, 2026.

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