Comparison

kubic vs Eureka

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

Head to head
About

kubic

This optical illusion puzzle game challenges players to construct impossible structures inspired by M.C. Escher's art. With a clean design and minimalistic graphics, it offers over 60 mind-bending puzzles across various geometric and spatial themes. Features include layer locking, zoom, and an in-game hint system to aid progression.

Highlights
  • Optical illusion puzzles
  • M.C. Escher inspired designs
  • Geometric and impossible objects
  • Layer locking and manipulation
  • Zoom and view controls
  • In-game hint system
  • Progress syncing via iCloud
Features
Read full description

***** #1 Puzzle Game in over 20 Countries! ***** ***** "This quirky puzzle game bends the limits of space and reality to make you create structures that, in theory, should be impossible to replicate." - Pocket Gamer 8/10 ***** ***** "As soothing as it is challenging, this grown-up puzzler opened our minds. Time flew by as we recreated sculpture after sculpture in increasingly difficult configurations. The game’s 3D graphics invite focus and sharpen problem-solving skills, making it an entertaining brain-builder. M.C. Escher would be impressed by the twisty, physics-defying structures." - App Store Notes ***** kubic is a unique optical illusion puzzle game based on M.C. Escher's art, impossible objects and other geometric designs. The object is to construct the goal configuration from a number of pieces. Presented in a simple, clean design and minimalistic art, kubic is a premium game with over 60 escher-esque puzzles. When you click on a piece, it pops to the front-most layer, and may overlap other pieces. When you combine the pieces, they do not merge. If there are extra pieces, you may hide them behind the others. You can also lock layers and drag pieces without changing their layer order. You can also use two finger pinch to zoom in and out and drag the view for a better control. If you are stuck on a puzzle you can simply skip it and re-visit at a later time. Rest assured, all puzzles can be solved but beware, some puzzles are hard! Just take your time...Tip: It helps to plan ahead and build figures from back to front. If you truly get stuck, there is a in-game hint system. You can use it to get started or even get the whole puzzle solved. Levels divided in 6 groups: • Ocean - "2D" Shapes are basically two-dimensional arrangements. • Desert - "3D" Shapes appear to be three-dimensional, but remember to think in two dimensions. • Mountain - "Convex/Concave" These optical illusions are inspired by Escher's famous "Convex and Concave" lithograph. • Sky - "Up/Down" These optical illusions are inspired by the Penrose Triangle featured in Escher's lithograph "Waterfall”. • Escher - Based on letter designs that spell out MC ESCHER. • Print - Based on the printable magazine version of Convex-Concave puzzles. Kubic is localized and supports 12 languages including English, French, German, Italian, Japanese, Korean, Chinese (simplified), Chinese (traditional), Portuguese, Russian, Spanish, and Turkish Game supports iCloud for progress syncing between devices. Convex Concave puzzles from the Heaven and Earth game are included with permission. The puzzles were designed by Scott Kim, Puzzlemaster (scottkim.com), and the Heaven & Earth team. Enjoy!

About

Eureka

This app offers over 50 mini-games designed to test and improve various cognitive skills like logic, memory, creativity, and focus. It provides a fun and challenging way to stimulate your brain and see if you can outsmart others.

Highlights
  • Over 50 mini-games
  • Tests logic, memory, creativity, speed
  • Improves focus and brain skills
  • Diverse and unique puzzles
  • Addictive brain challenge
Features
Read full description

If you think you are smart, think twice! Eureka is the right brain game to tell if you are a real genius! Featuring more than 50 mini-games to challenge your brain skills (logic, memory, creativity, speed, reflex, focus, etc.), Eureka is the addictive brain challenge your brain needs to go from dumb to genius. Are you up to the challenge? Eureka is full of brainteasers and fun mini-games that you can enjoy forever. Each brain game will be different from the previous, so you can enjoy original, creative and unique puzzles specifically designed to push your brain limits! Are you smarter than your friends are? Do you think outside the box? Can you pass more than 50 different brainy tricky mini-games? Eureka is the brain challenge you need! GAME FEATURES: • Diverse gameplay to keep your brain activated for hours • Each level is a different brain game • Simple to learn and easy to understand • Fun yet challenging brain challenge • Improve your focus and brain skills with diverse mini-games Accept the brain challenge and prove you have a creative mind! Infinity Games aims to provide the best game experience within its titles. We love showcasing new minimalist puzzle games and making people think while relaxing. Do you like our work? Connect below: Facebook: https://www.facebook.com/infinitygamespage Instagram: 8infinitygames (https://www.instagram.com/8infinitygames/)

Screenshots

kubic4 screens
Eureka4 screens

Verdict

The call

The clearest difference is review sentiment: Eureka at 77% against kubic's 36%. Eureka also leads on rating (4.7 vs 4.4) and update cadence (every 4 weeks vs every 2 months). On price, ratings volume, ads and in-app purchases 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. kubic sells 5 one-off in-app purchases and Eureka sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Eureka holds the better App Store score, 4.7 against 4.4. Both are backed by a comparable volume of ratings — 245 and 510 respectively. Written reviews point the same way: 36% of kubic's written reviews are positive against 77% of Eureka's.

UpkeepUpdate frequency

kubic ships an update every 2 months, Eureka every 4 weeks. The most recent releases landed on September 28, 2026 and September 29, 2026 respectively.

Scorecard3 real differences · 7 level
kubic versus Eureka: the parameters behind the verdict, then further details
ParameterkubicEureka
PriceFreeFree
Rating4.4 (245 ratings)4.7 (510 ratings) — better
Positive reviews36.4% of reviews76.9% of reviews — better
Number of ratings245510 — better
Update frequencyEvery 2 monthsEvery 4 weeks — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.012.0 — better
Further details — not scored
Size383 MB140 MB
Age rating4+4+
DeveloperPixel Envision Ltd.INFINITY GAMES, LDA

Customer experience

kubic

All ratings245 ratings
Positive82.9%
Neutral6.5%
Negative10.6%
Written reviews33 reviews
Positive36.4%
Neutral15.2%
Negative48.5%

Eureka

All ratings510 ratings
Positive91.6%
Neutral6.7%
Negative1.8%
Written reviews13 reviews
Positive76.9%
Neutral0.0%
Negative23.1%

User reviews

kubic

From 245 App Store ratings

What we love

  • 💡 Original and clever puzzles
  • 🧠 Mind-bending challenges
  • 👍 Fun and engaging gameplay
  • ✨ Well-realized game concept
  • 🤔 Puzzles make you think

Room to improve

  • 😠 Frustrating tile placement
  • 📉 Steep difficulty curve
  • 💸 Excessive and intrusive ads
  • 😩 Stressful user experience
  • ⚠️ Ads interrupt gameplay

Eureka

From 510 App Store ratings

What we love

  • 🤩 Fun and engaging gameplay
  • 🧠 Challenges the mind
  • 👍 Kid-friendly
  • 😍 Addictive and immersive
  • 💯 Great for cognitive exercise

Room to improve

  • anúncios Ads are intrusive
  • 🗑️ Paid version still has ads
  • 🧩 Lacks variety in puzzles

Bugs and requests

kubic

Reported bugs

5 issues
  • Tiles not sticking correctly
  • App won't launch offline
  • App won't load/crashes on launch
  • In-app purchase attempts forced
  • Bug with in-app purchase activation

Requested features

5 requests
  • Fix tile placement issues
  • Improve difficulty curve
  • Option to rotate puzzles
  • Option to lock in pieces
  • Dark mode for night play

Eureka

Reported bugs

2 issues
  • Ads after every level
  • Paid version with ads

In-app purchases

5 purchases

kubic

One-time5
  • 10 Hints$0.99
  • No Ads$1.99
  • 25 Hints$1.99
Show 2 more
  • 50 Hints$2.99
  • 100 Hints$3.99
1 purchases

Eureka

One-time1
  • Remove Ads$1.99

Questions

Is kubic free?
kubic is free to download, with in-app purchases available.
Is Eureka free?
Eureka is free to download, with in-app purchases available.
Which has better reviews, kubic or Eureka?
Eureka is rated higher. kubic averages 4.4 out of 5 from 245 ratings, while Eureka averages 4.7 from 510 ratings.
Do kubic or Eureka have ads?
Both kubic and Eureka show ads.
Which is updated more often, kubic or Eureka?
kubic ships an update every 2 months, and Eureka every 4 weeks. Most recently, kubic was updated on September 28, 2026 and Eureka on September 29, 2026.

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