# Sentence Builder Master Pro vs Reef AI

The clearest difference is update cadence: Reef AI at every 2 weeks against Sentence Builder Master Pro's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

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

Sentence Builder Master Pro ships an update every 3 months, Reef AI every 2 weeks. The most recent releases landed on September 8, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Sentence Builder Master Pro | Reef AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (46 ratings)](https://appshunter.io/ios/app/sentence-builder-master-pro/id1236551331/reviews)** | — |
| Number of ratings | **46** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Paid | — |
| Size | 46 MB | 68 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Imanol Fernandez Gorostizaga](https://appshunter.io/developer/313095639) | [Alexandru Ghinea](https://appshunter.io/developer/1880428110) |

## What reviewers say

### Sentence Builder Master Pro

[App page](https://appshunter.io/ios/app/sentence-builder-master-pro/id1236551331)

Learn English grammar and vocabulary by unscrambling words to form correct sentences. This educational game offers multiple difficulty levels and a fun way to improve language skills for learners of all ages. Compete with others or play solo to master sentence structure and idioms.

**Highlights:** Word unscrambling for sentence formation, Multiple difficulty levels (Beginner to Expert), Proverbs and Sayings level for idioms, Online multiplayer mode, Game Center integration, Time penalties for incorrect order

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

**In-app purchases:** none


### Reef AI

[App page](https://appshunter.io/ios/app/reef-ai/id6765625125)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sentence Builder Master Pro free?

Sentence Builder Master Pro is free to download, with no in-app purchases.

### Is Reef AI free?

Reef AI is free to download, with no in-app purchases.

### Do Sentence Builder Master Pro or Reef AI have ads?

Neither Sentence Builder Master Pro nor Reef AI shows ads.

### Which is updated more often, Sentence Builder Master Pro or Reef AI?

Sentence Builder Master Pro ships an update every 3 months, and Reef AI every 2 weeks. Most recently, Sentence Builder Master Pro was updated on September 8, 2026 and Reef AI on September 10, 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.*