# Brain Busta vs Chain Reaction(Online)

The clearest difference is rating: Brain Busta at 5.0 against Chain Reaction(Online)'s 4.6. Brain Busta also leads on monetization model (free vs ad-supported). Chain Reaction(Online)'s advantage is ratings volume (18 vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Brain Busta holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Chain Reaction(Online) has 18 ratings behind it against 1, so its average is the more settled of the two.

Brain Busta ships an update fortnightly, Chain Reaction(Online) every 3 weeks. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Brain Busta | Chain Reaction(Online) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/brain-busta/id6475490280/reviews)** | [4.6 (18 ratings)](https://appshunter.io/ios/app/chain-reactiononline/id6748000370/reviews) |
| Number of ratings | 1 | **18** |
| Positive reviews | — | 40.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | **Free** | Ad-supported |
| Size | 1 MB | 70 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Brendan Johnson](https://appshunter.io/developer/1565685869) | [OVALON SOLUTIONS](https://appshunter.io/developer/1791928695) |

## What reviewers say

### Brain Busta

[App page](https://appshunter.io/ios/app/brain-busta/id6475490280)

Sharpen your arithmetic skills with engaging math challenges and a convenient built-in calculator. Test your speed with timed puzzles and track your progress across various categories. Enjoy offline play for continuous learning and practice.

**Highlights:** In-app calculator, Diverse math challenges, Timed puzzles, Progress tracking, Offline mode, User-friendly design

**In-app purchases:** none


### Chain Reaction(Online)

[App page](https://appshunter.io/ios/app/chain-reactiononline/id6748000370)

Engage in a captivating board strategy game with friends or AI. Plan your moves carefully to dominate the board and trigger chain reactions. Enjoy online and offline multiplayer modes with customizable options.

**Highlights:** Online multiplayer battles, Offline mode available, Smart AI with 3 difficulty levels, Supports up to 10 players, Customizable skins, Simple to learn, endless strategies

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

**In-app purchases:** none


## Frequently asked questions

### Is Brain Busta free?

Brain Busta is free to download, with no in-app purchases.

### Is Chain Reaction(Online) free?

Chain Reaction(Online) is free to download, with no in-app purchases.

### Which has better reviews, Brain Busta or Chain Reaction(Online)?

Brain Busta is rated higher. Brain Busta averages 5.0 out of 5 from 1 ratings, while Chain Reaction(Online) averages 4.6 from 18 ratings.

### Do Brain Busta or Chain Reaction(Online) have ads?

Neither Brain Busta nor Chain Reaction(Online) shows ads.

### Which is updated more often, Brain Busta or Chain Reaction(Online)?

Brain Busta ships an update fortnightly, and Chain Reaction(Online) every 3 weeks. Most recently, Brain Busta was updated on November 4, 2026 and Chain Reaction(Online) on October 30, 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.*