# PET ToolBox vs Sentence Builder Master Pro

The clearest difference is price: Sentence Builder Master Pro at Free against PET ToolBox's $7.99. Sentence Builder Master Pro also leads on update cadence (every 3 months vs every 7 months). PET ToolBox's advantage is iOS requirement (13.0 vs 15.6). On ads, in-app purchases and device support there is nothing between them.

Sentence Builder Master Pro is free to download; PET ToolBox costs $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PET ToolBox ships an update every 7 months, Sentence Builder Master Pro every 3 months. The most recent releases landed on October 12, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | PET ToolBox | Sentence Builder Master Pro |
| --- | --- | --- |
| Price | $7.99 | **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 7 months | **Every 3 months** |
| Monetization | — | Paid |
| Size | 2 MB | 46 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Aidan Michael Casey](https://appshunter.io/developer/916717333) | [Imanol Fernandez Gorostizaga](https://appshunter.io/developer/313095639) |

## What reviewers say

### PET ToolBox

[App page](https://appshunter.io/ios/app/pet-toolbox/id1232129262)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is PET ToolBox free?

PET ToolBox costs $7.99, with no in-app purchases.

### Is Sentence Builder Master Pro free?

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

### Do PET ToolBox or Sentence Builder Master Pro have ads?

Neither PET ToolBox nor Sentence Builder Master Pro shows ads.

### Which is updated more often, PET ToolBox or Sentence Builder Master Pro?

PET ToolBox ships an update every 7 months, and Sentence Builder Master Pro every 3 months. Most recently, PET ToolBox was updated on October 12, 2026 and Sentence Builder Master Pro on October 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.*