# Brain It On! vs Fat Slice 2

The clearest difference is ads: Fat Slice 2 at none against Brain It On!'s shown. Fat Slice 2 also leads on update cadence (every 8 days vs every 3 weeks) and iOS requirement (8.0 vs 15.0). Brain It On!'s advantage is review sentiment (81% vs 50%) and ratings volume (5.1K vs 7). On price, rating, in-app purchases and monetization model there is nothing between them.

Both are free to download. Brain It On! sells 9 one-off in-app purchases and Fat Slice 2 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.5 for Brain It On! against 4.6 for Fat Slice 2. That said, the two scores are not equally well evidenced: Brain It On! has 5.1K ratings behind it against 7, so its average is the more settled of the two. Written reviews are what separate them: 81% of Brain It On!'s written reviews are positive against 50% of Fat Slice 2's.

Brain It On! ships an update every 3 weeks, Fat Slice 2 every 8 days. The most recent releases landed on October 1, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Brain It On! | Fat Slice 2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (5.1K ratings)](https://appshunter.io/ios/app/brain-it-on/id985367692/reviews) | **[4.6 (7 ratings)](https://appshunter.io/ios/app/fat-slice-2/id1291743772/reviews)** |
| Number of ratings | **5.1K** | 7 |
| Positive reviews | **81.0% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 8 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 191 MB | 40 MB |
| Requires iOS | 15.0 | **8.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Orbital Nine Games Inc](https://appshunter.io/developer/887216732) | [ChewOnGlass.com](https://appshunter.io/developer/466334216) |

## What reviewers say

### Brain It On!

[App page](https://appshunter.io/ios/app/brain-it-on/id985367692)

Engage your mind with tricky physics puzzles. Draw shapes to find creative solutions to increasingly difficult challenges. Compete with friends and discover multiple ways to solve each puzzle.

**Highlights:** Dozens of brain-busting puzzles, Puzzles added regularly, Compete with friends, Multiple solutions per puzzle, Share unique solutions

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Popup Ads | $0.99 | one-time |
| The Full Game (75% off) | $0.99 | one-time |
| Coin Pack | $0.99 | one-time |
| The Full Game (50% off) | $1.99 | one-time |
| Coin Pack | $1.99 | one-time |
| The Full Game (25% off) | $2.99 | one-time |
| Coin Pack | $2.99 | one-time |
| The Full Game | $3.99 | one-time |
| Coin Pack | $3.99 | one-time |

**What reviewers like**

- 🚀 Challenging and fun
- 🔒 No ads
- 👍 Engaging physics-based puzzles
- 👍 Encourages creative thinking
- 👍 Good for brain exercise

**What reviewers complain about**

- 🐛 Drawing accuracy issues
- 🐛 Glitches and crashes
- 🐛 Difficulty spikes too quickly
- 🔋 Overheating on some devices
- 👎 Too many ads for hints

**Reported bugs**

- Level selector not working past level 220
- Inability to draw near screen edges due to OS gestures
- Hint videos not always helpful
- In-app purchases not working as expected

**Requested features**

- More levels
- Level editor to create custom puzzles
- Ability to save progress
- Improved drawing controls
- Better hints and guidance


### Fat Slice 2

[App page](https://appshunter.io/ios/app/fat-slice-2/id1291743772)

A touch-based puzzle game where you slice shapes to meet a target size while avoiding obstacles. Compete with friends and aim for high scores on the leaderboard. Unlock new levels and achievements as you progress.

**Highlights:** Touch screen swiping gameplay, Slice shapes to reach goal size, Avoid bouncing balls and bombs, 21 free levels plus bonus levels, 40 paid levels including Gauntlet and Infinite Mode, Achievements and leaderboards

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Pie Edition | $2.99 | one-time |


## Frequently asked questions

### Is Brain It On! free?

Brain It On! is free to download, with in-app purchases available.

### Is Fat Slice 2 free?

Fat Slice 2 is free to download, with in-app purchases available.

### Which has better reviews, Brain It On! or Fat Slice 2?

Fat Slice 2 is rated higher. Brain It On! averages 4.5 out of 5 from 5.1K ratings, while Fat Slice 2 averages 4.6 from 7 ratings.

### Do Brain It On! or Fat Slice 2 have ads?

Brain It On! shows ads; Fat Slice 2 does not.

### Which is updated more often, Brain It On! or Fat Slice 2?

Brain It On! ships an update every 3 weeks, and Fat Slice 2 every 8 days. Most recently, Brain It On! was updated on October 1, 2026 and Fat Slice 2 on September 17, 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.*