# PET ToolBox vs Grammar Fix

The clearest difference is price: Grammar Fix at Free against PET ToolBox's $7.99. Grammar Fix also leads on update cadence (monthly vs every 7 months). PET ToolBox's advantage is in-app purchases (none vs 2) and iOS requirement (13.0 vs 16.6). On ads and device support there is nothing between them.

Grammar Fix is free to download; PET ToolBox costs $7.99 up front. Grammar Fix sells 2 one-off in-app purchases. PET ToolBox asks for nothing beyond the download.

PET ToolBox ships an update every 7 months, Grammar Fix monthly. The most recent releases landed on October 12, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | PET ToolBox | Grammar Fix |
| --- | --- | --- |
| Price | $7.99 | **Free** |
| Rating | — | **[4.8 (1.8K ratings)](https://appshunter.io/ios/app/grammar-fix/id1457909769/reviews)** |
| Number of ratings | — | **1.8K** |
| Positive reviews | — | 85.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Monthly** |
| Monetization | — | Free |
| Size | 2 MB | 11 MB |
| Requires iOS | **13.0** | 16.6 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Aidan Michael Casey](https://appshunter.io/developer/916717333) | [Solid Apps S.R.L.](https://appshunter.io/developer/1653740418) |

## What reviewers say

### PET ToolBox

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Grammar Fix

[App page](https://appshunter.io/ios/app/grammar-fix/id1457909769)

Learn to avoid the 10 most common grammar mistakes quickly. Improve your writing and ensure your ideas are clearly understood. Master essential grammar in just minutes per topic.

**Highlights:** Learn 10 common grammar mistakes, Improve clarity of ideas, Enhance understanding, Quick learning sessions, Basic grammar mastery

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock this app (lifetime) | $4.99 | one-time |
| Unlock ALL 10 Solid Apps (lifetime) | $9.99 | one-time |

**What reviewers like**

- 👍 Easy and fun to use
- 🚀 Genuinely helpful for learning grammar concepts
- 💡 Effective for improving grammar skills
- 👍 Well-designed and easy to understand
- 👍 Reasonable pricing, no subscription

**What reviewers complain about**

- 🐛 Some grammar tips are incorrect
- 💡 Needs more advanced grammar lessons and practice

**Reported bugs**

- App has only 10 steps, which is not enough

**Requested features**

- More learning content and practice questions
- Additional optional modules for more practice


## Frequently asked questions

### Is PET ToolBox free?

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

### Is Grammar Fix free?

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

### Do PET ToolBox or Grammar Fix have ads?

Neither PET ToolBox nor Grammar Fix shows ads.

### Which is updated more often, PET ToolBox or Grammar Fix?

PET ToolBox ships an update every 7 months, and Grammar Fix monthly. Most recently, PET ToolBox was updated on October 12, 2026 and Grammar Fix on October 15, 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.*