# Sum Fun vs Shatterbrain

The clearest difference is in-app purchases: Sum Fun at none against Shatterbrain's 1. Sum Fun also leads on update cadence (weekly vs every 11 months) and rating (4.9 vs 4.6). Shatterbrain's advantage is ratings volume (436 vs 33). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Shatterbrain sells 1 one-off in-app purchase. Sum Fun asks for nothing beyond the download.

Sum Fun holds the better App Store score, 4.9 against 4.6. That said, the two scores are not equally well evidenced: Shatterbrain has 436 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 86% of Shatterbrain's.

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

## The numbers

| Metric | Sum Fun | Shatterbrain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (33 ratings)](https://appshunter.io/ios/app/sum-fun/id817544892/reviews)** | [4.6 (436 ratings)](https://appshunter.io/ios/app/shatterbrain/id1317443919/reviews) |
| Number of ratings | 33 | **436** |
| Positive reviews | **100.0% of reviews** | 86.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Weekly** | Every 11 months |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 195 MB | 112 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Greg Sharpe](https://appshunter.io/developer/817544895) | [Orbital Nine Games Inc](https://appshunter.io/developer/887216732) |

## 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


### Shatterbrain

[App page](https://appshunter.io/ios/app/shatterbrain/id1317443919)

Engage in challenging physics puzzles by drawing shapes to find solutions. Discover multiple ways to solve each level and compete on leaderboards for the best performance. This game is designed for those who enjoy brain teasers and applying physics principles.

**Highlights:** Dozens of physics puzzles, Multiple solutions per puzzle, Leaderboard competition, Draw shapes to solve, Challenging gameplay

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Game | $1.99 | one-time |

**What reviewers like**

- 🚀 Relaxing challenge
- 🚀 Elegant and challenging physics-based puzzles
- 👍 Enjoyable and addictive gameplay
- 👍 Stimulates the mind
- 👍 Reasonable ad implementation

**What reviewers complain about**

- 🐛 Occasional crashes or freezes
- 🔍 Lack of instructions or guidance
- 🔍 Difficulty progressing without 3-starring levels
- 🔍 Some levels too easy or too difficult

**Reported bugs**

- Freezing or crashing on certain levels
- Issues with drawing/controls not registering properly

**Requested features**

- More levels and content updates
- Ability to skip levels without 3 stars
- Customizable hint/solution system


## Frequently asked questions

### Is Sum Fun free?

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

### Is Shatterbrain free?

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

### Which has better reviews, Sum Fun or Shatterbrain?

Sum Fun is rated higher. Sum Fun averages 4.9 out of 5 from 33 ratings, while Shatterbrain averages 4.6 from 436 ratings.

### Do Sum Fun or Shatterbrain have ads?

Both Sum Fun and Shatterbrain show ads.

### Which is updated more often, Sum Fun or Shatterbrain?

Sum Fun ships an update weekly, and Shatterbrain every 11 months. Most recently, Sum Fun was updated on September 18, 2026 and Shatterbrain 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.*