PET ToolBox vs Grammar Fix
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PET ToolBox
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Cambridge Preliminary B1© Preparation will help you to improve the essential language skills you need to pass the Reading and Writing paper of the Cambridge Preliminary© or Preliminary for Schools© exams. To this end, the app focuses on Part 1 (notices and messages), Part 5 (gap fill) and Part 6 (sentence rewriting). Each section consists of a series of ten three-minute lessons with notes and exercises, which review the essential language items and skills tested in PET. Cambridge Preliminary B1 Preparation is especially recommended for the final stage of preparation in the weeks leading up to the exam.
Grammar Fix
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.
- Learn 10 common grammar mistakes
- Improve clarity of ideas
- Enhance understanding
- Quick learning sessions
- Basic grammar mastery
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Grammar Fix is here to help you understand and avoid the 10 most common grammar mistakes in as little as 10 minutes each. If you feel like your ideas don't always get through to others or you'd like to have an easier time being understood, good basic grammar is a great place to start and an easy fix.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | PET ToolBox | Grammar Fix |
|---|---|---|
| Price | $7.99 | Free — better |
| Rating | — | 4.8 (1.8K ratings) — better |
| Positive reviews | — | 85.0% of reviews |
| Number of ratings | — | 1.8K — better |
| Update frequency | Every 7 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 13.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 2 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Aidan Michael Casey | Solid Apps S.R.L. |
Bugs and requests
PET ToolBox
Not enough reviews yet to summarise bugs or requests.
Grammar Fix
Reported bugs
1 issue- App has only 10 steps, which is not enough
Requested features
2 requests- More learning content and practice questions
- Additional optional modules for more practice
In-app purchases
PET ToolBox
No in-app purchases
Grammar Fix
- Unlock this app (lifetime)$4.99
- Unlock ALL 10 Solid Apps (lifetime)$9.99
Questions
Is PET ToolBox free?
Is Grammar Fix free?
Do PET ToolBox or Grammar Fix have ads?
Which is updated more often, PET ToolBox or Grammar Fix?
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