# Iq Brain Test, Math for adults vs Concentration Game, 9Bubbles

Iq Brain Test, Math for adults and Concentration Game, 9Bubbles both sit at 4.4 stars, but that hides the real split: 55% of Concentration Game, 9Bubbles's written reviews are positive against 31% of Iq Brain Test, Math for adults's. Concentration Game, 9Bubbles also leads on iOS requirement (12.0 vs 16.0). Iq Brain Test, Math for adults's advantage is ratings volume (810 vs 46) and chart position (#189 vs unranked). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Iq Brain Test, Math for adults sells 10 in-app purchases, starting at $1.99 per month and Concentration Game, 9Bubbles sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.4 for Iq Brain Test, Math for adults against 4.4 for Concentration Game, 9Bubbles. That said, the two scores are not equally well evidenced: Iq Brain Test, Math for adults has 810 ratings behind it against 46, so its average is the more settled of the two. Written reviews are what separate them: 31% of Iq Brain Test, Math for adults's written reviews are positive against 55% of Concentration Game, 9Bubbles's.

Iq Brain Test, Math for adults ships an update fortnightly, Concentration Game, 9Bubbles every 10 days. Both last shipped on November 2, 2026.

## The numbers

| Metric | Iq Brain Test, Math for adults | Concentration Game, 9Bubbles |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (810 ratings)](https://appshunter.io/ios/app/iq-brain-test-math-for-adults/id1147801802/reviews)** | [4.4 (46 ratings)](https://appshunter.io/ios/app/concentration-game-9bubbles/id1366569537/reviews) |
| Number of ratings | **810** | 46 |
| Positive reviews | 31.3% of reviews | **54.5% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Fortnightly | **Every 10 days** |
| Monetization | Freemium | Free with in-app purchases |
| Best chart rank | **#189** | — |
| Size | 375 MB | 43 MB |
| Requires iOS | 16.0 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Genioworks Consulting & It-Services UG (haftungsbeschrankt)](https://appshunter.io/developer/1147801801) | [Lisfee, Inc.](https://appshunter.io/developer/1146331015) |

## What reviewers say

### Iq Brain Test, Math for adults

[App page](https://appshunter.io/ios/app/iq-brain-test-math-for-adults/id1147801802)

**Currently charting:** #189 Top Free · Trivia (US App Store)

Enhance your mental math skills with engaging games and practice modes. Improve logic, memory, and IQ through timed arithmetic challenges and puzzles. Track progress and compete with friends to boost cognitive abilities.

**Highlights:** Mental arithmetic practice, Multiplication tables, Logic and memory training, Timed math puzzles, IQ development, Progress tracking

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Special Offer | $1.99 | per month |
| Premium Special offer | $1.99 | per 7 days |
| Premium | $4.49 | per month |
| Premium | $4.99 | per month |
| Premium | $5.99 | per 7 days |
| Special Offer | $17.99 | per year |
| Premium | $22.49 | per year |
| Improve your math skills | $26.99 | per year |
| Premium | $29.99 | per year |
| Premium Access | $39.99 | one-time |

**What reviewers like**

- 🧠 Excellent brain training and cognitive exercises
- 🎮 Variety of interesting puzzle games
- 👍 Good user interface and design
- 🎯 Helpful for memory and mental agility
- ⭐ Engaging and entertaining gameplay

**What reviewers complain about**

- 📺 Excessive and intrusive advertising
- 💰 Expensive subscription pricing
- 💳 Misleading free-to-play model with mandatory payments
- 📺 Ads persist even after paying for premium
- 🚫 Difficult to unsubscribe or cancel

**Reported bugs**

- Connect the Dots game stuck at level 29
- Multiplication mode crashes or functions incorrectly
- White screen display issues
- App crashes on launch for some devices
- Daily workout mode crashes when selected

**Requested features**

- Restore competitive bot mode with medals/weekly tasks
- Add Arabic language support
- Implement age-appropriate difficulty levels
- Add permanent purchase option instead of subscription
- Improve translation quality


### Concentration Game, 9Bubbles

[App page](https://appshunter.io/ios/app/concentration-game-9bubbles/id1366569537)

This game challenges your memory and concentration by requiring you to memorize and recall the colors and positions of bubbles. Designed to improve cognitive skills and creativity, it offers increasing difficulty across 28 stages.

**Highlights:** Memorize colors and positions, Burst bubbles based on memory, Improves memory power, Enhances creative ability, 28 challenging stages, Trains the right side of the brain

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FEEL GOOD | $1.99 | one-time |
| TRY STAGE28 | $1.99 | one-time |
| 10 LIFEs | $1.99 | one-time |
| DELETE ADs | $1.99 | one-time |


## Frequently asked questions

### Is Iq Brain Test, Math for adults free?

Iq Brain Test, Math for adults is free to download, with in-app purchases available.

### Is Concentration Game, 9Bubbles free?

Concentration Game, 9Bubbles is free to download, with in-app purchases available.

### Which has better reviews, Iq Brain Test, Math for adults or Concentration Game, 9Bubbles?

Iq Brain Test, Math for adults is rated higher. Iq Brain Test, Math for adults averages 4.4 out of 5 from 810 ratings, while Concentration Game, 9Bubbles averages 4.4 from 46 ratings.

### Do Iq Brain Test, Math for adults or Concentration Game, 9Bubbles have ads?

Both Iq Brain Test, Math for adults and Concentration Game, 9Bubbles show ads.

### Which is updated more often, Iq Brain Test, Math for adults or Concentration Game, 9Bubbles?

Iq Brain Test, Math for adults ships an update fortnightly, and Concentration Game, 9Bubbles every 10 days. Most recently, Iq Brain Test, Math for adults was updated on November 2, 2026 and Concentration Game, 9Bubbles on November 2, 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.*