Comparison

kubic vs 大人の右脳ドリル

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
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***** #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

大人の右脳ドリル

Features
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毎日脳トレしようよ\(^o^)/ あなたの右脳はカチコチに固くなっていませんか? シンプルなゲームで空間認識能力を鍛えましょう! 「一番大きい数字はどれ?」 「色が違うのはどれ?」 「形が違う仲間はずれはどれ?」 遊び方は3種類! お題に合ったパズルを見つけてタップするだけの簡単操作! 遊べば遊ぶほど右脳が活性化されます。 あなたは何点とれますか?

Screenshots

kubic4 screens
大人の右脳ドリル3 screens

Verdict

The call

The clearest difference is rating: 大人の右脳ドリル at 5.0 against kubic's 4.4. 大人の右脳ドリル also leads on in-app purchases (none vs 5) and iOS requirement (11.0 vs 13.0). kubic's advantage is ratings volume (245 vs 1) and review sentiment (36% vs 15%). On price, update cadence, ads 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. kubic sells 5 one-off in-app purchases. 大人の右脳ドリル asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

大人の右脳ドリル holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: kubic has 245 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 36% of kubic's written reviews are positive against 15% of 大人の右脳ドリル's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 23, 2026 and October 8, 2026 respectively.

Scorecard5 real differences · 5 level
kubic versus 大人の右脳ドリル: the parameters behind the verdict, then further details
Parameterkubic大人の右脳ドリル
PriceFreeFree
Rating4.4 (245 ratings)5.0 (1 ratings) — better
Positive reviews36.4% of reviews — better15.4% of reviews
Number of ratings245 — better1
Update frequencyEvery 2 monthsEvery 2 months
AdsYesYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.011.0 — better
Further details — not scored
Size383 MB125 MB
Age rating4+4+
DeveloperPixel Envision Ltd.ZERONE

Customer experience

kubic

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

大人の右脳ドリル

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews13 reviews
Positive15.4%
Neutral7.7%
Negative76.9%

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

大人の右脳ドリル

Not enough reviews yet to summarise bugs or requests.

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
None

大人の右脳ドリル

No in-app purchases

Questions

Is kubic free?
kubic is free to download, with in-app purchases available.
Is 大人の右脳ドリル free?
大人の右脳ドリル is free to download, with no in-app purchases.
Which has better reviews, kubic or 大人の右脳ドリル?
大人の右脳ドリル is rated higher. kubic averages 4.4 out of 5 from 245 ratings, while 大人の右脳ドリル averages 5.0 from 1 ratings.
Do kubic or 大人の右脳ドリル have ads?
Both kubic and 大人の右脳ドリル show ads.
Which is updated more often, kubic or 大人の右脳ドリル?
kubic ships an update every 2 months, and 大人の右脳ドリル every 2 months. Most recently, kubic was updated on October 23, 2026 and 大人の右脳ドリル on October 8, 2026.

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