# Sum Fun vs Brain Dots

The clearest difference is review sentiment: Sum Fun at 100% against Brain Dots's 50%. Sum Fun also leads on rating (4.9 vs 4.4) and in-app purchases (none vs 10). Brain Dots's advantage is ratings volume (8.2K vs 33). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Brain Dots sells 10 one-off in-app purchases. Sum Fun asks for nothing beyond the download.

Sum Fun holds the better App Store score, 4.9 against 4.4. That said, the two scores are not equally well evidenced: Brain Dots has 8.2K ratings behind it against 33, so its average is the more settled of the two. Written reviews point the same way: 100% of Sum Fun's written reviews are positive against 50% of Brain Dots's.

Sum Fun ships an update weekly, Brain Dots every 11 days. The most recent releases landed on September 18, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Sum Fun | Brain Dots |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (33 ratings)](https://appshunter.io/ios/app/sum-fun/id817544892/reviews)** | [4.4 (8.2K ratings)](https://appshunter.io/ios/app/brain-dots/id1004227662/reviews) |
| Number of ratings | 33 | **8.2K** |
| Positive reviews | **100.0% of reviews** | 49.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Weekly** | Every 11 days |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 195 MB | 62 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Greg Sharpe](https://appshunter.io/developer/817544895) | [Translimit, Inc.](https://appshunter.io/developer/845044431) |

## What reviewers say

### Sum Fun

[App page](https://appshunter.io/ios/app/sum-fun/id817544892)

A unique number puzzle game that combines logic, numbers, and strategy. Enjoy endlessly replayable puzzles with creative board shapes and a brain-boosting gameplay experience. Play at your own pace with no time limits and challenge friends.

**Highlights:** Unique number puzzle gameplay, Variety of creative board shapes, Brain-boosting mental workout, No time limits for relaxed play, Challenge friends offline, Easy to play, fun to master

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

**In-app purchases:** none


### Brain Dots

[App page](https://appshunter.io/ios/app/brain-dots/id1004227662)

A challenging puzzle game where you draw lines and shapes to make two balls collide. Collect different drawing tools and create your own levels to test the skills of players worldwide. It's a test of logic and flexible thinking.

**Highlights:** Bump two balls to clear stages, Draw lines and shapes freely, Collect over 25 varieties of pens, Create and share custom stages, Review and share victory moments, Tests logical thinking and flexibility

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mechanical pencil | $0.99 | one-time |
| Pen | $0.99 | one-time |
| Colored pencil | $0.99 | one-time |
| Crayon | $1.99 | one-time |
| Brush | $1.99 | one-time |
| Watercolor painting brush | $1.99 | one-time |
| Decorated pen | $2.99 | one-time |
| Rainbow pencil | $2.99 | one-time |
| Fountain pen | $3.99 | one-time |
| Remove Cut-In Ads | $3.99 | one-time |

**What reviewers like**

- 🧠 Challenging and engaging puzzles
- 🎨 Variety of pen styles and customization options
- ⚙️ Interesting physics-based gameplay
- 👍 Fun for all ages

**What reviewers complain about**

- 💢 Excessive and intrusive ads
- 🐛 Frequent crashes and bugs
- 🔋 High battery consumption
- 📱 Compatibility issues with older devices
- 👀 Difficulty seeing around finger when drawing

**Reported bugs**

- Crashes when trying to create own levels
- Hint feature not working as expected
- Inability to play on iOS 17 devices

**Requested features**

- Ability to save and transfer progress across devices
- Option to disable hint prompts
- More advanced level creation tools
- Improved Apple Pencil support


## Frequently asked questions

### Is Sum Fun free?

Sum Fun is free to download, with no in-app purchases.

### Is Brain Dots free?

Brain Dots is free to download, with in-app purchases available.

### Which has better reviews, Sum Fun or Brain Dots?

Sum Fun is rated higher. Sum Fun averages 4.9 out of 5 from 33 ratings, while Brain Dots averages 4.4 from 8.2K ratings.

### Do Sum Fun or Brain Dots have ads?

Both Sum Fun and Brain Dots show ads.

### Which is updated more often, Sum Fun or Brain Dots?

Sum Fun ships an update weekly, and Brain Dots every 11 days. Most recently, Sum Fun was updated on September 18, 2026 and Brain Dots on September 22, 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.*