# kubic vs 大人の右脳ドリル

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.

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.

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.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | kubic | 大人の右脳ドリル |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (245 ratings)](https://appshunter.io/ios/app/kubic/id1062903406/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id1497444971/reviews)** |
| Number of ratings | **245** | 1 |
| Positive reviews | **36.4% of reviews** | 15.4% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 383 MB | 125 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pixel Envision Ltd.](https://appshunter.io/developer/444289214) | [ZERONE](https://appshunter.io/developer/1708775781) |

## What reviewers say

### kubic

[App page](https://appshunter.io/ios/app/kubic/id1062903406)

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:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10 Hints | $0.99 | one-time |
| No Ads | $1.99 | one-time |
| 25 Hints | $1.99 | one-time |
| 50 Hints | $2.99 | one-time |
| 100 Hints | $3.99 | one-time |

**What reviewers like**

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

**What reviewers complain about**

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

**Reported bugs**

- 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**

- 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

[App page](https://appshunter.io/ios/app/id1497444971)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked 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 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*