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Chmod Toolkit

Chmod Toolkit

Master permissions & cert prep

4 ratings
2 reviews
🔧 Utilities
🛠️ Developer Tools
Free
In-App Purchases

Details

Released
January 6, 2026
Updated
September 21, 2026

Features

Developer

Robert Frederique
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🧾$24.99
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About

Master Unix file permissions with this comprehensive learning tool. Practice exam simulations, spaced repetition, and detailed progress tracking to prepare for Linux certifications or server hardening. Supports iPhone, iPad, and Mac with iCloud sync.

✓Unix permissions mastery
✓Certification exam simulation
✓Spaced repetition learning
✓Domain-specific study
✓Progress tracking dashboard
✓Multi-device support with iCloud sync
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What's New in Chmod Toolkit

3.3

September 21, 2026

Ready for iPhone Duo and iOS 27. • Every screen lays out for the iPhone Duo's inner display, in any orientation, and keeps its place through a fold. • Done, Close and Cancel use the new system toolbar buttons. • Text sizes follow the display, and the result card never wraps on compact screens. • Try it with Siri: say "Explain chmod in Chmod Toolkit" and Siri answers with the app's own explanation. Every phrase is under Settings. • Tuned for iOS 27, with every explanation re-checked against Apple's newest on-device intelligence.

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Subscriptions & In-App Purchases

$24.99

Pro Features

Advanced security scanner for Linux file permissions.

User reviews

Most RecentHighest RatedLowest Rated

Simple, useful and educational

Chmod Toolkit is a simple but extremely useful app. It makes working with Linux file permissions much easier by clearly showing chmod values and permission combinations. The built-in quizzes are a great addition and really make you think through how permissions work instead of just memorizing numbers. Clean, practical, and perfect for quick reference.
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PPatoumd

Nothing like it

Currently prepping for Linux+ and this is the first study app that actually feels like exam prep, not just a quiz. The domain tracking shows me where I'm weak before I even take the exam.  Nothing like it covers permissions that I’ve been seen. Going into exam day will feel way more prepared with permissions, which is my weakest area.
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BOBIG G ONE

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FAQ

What Unix permissions concepts does Chmod Toolkit cover?

Chmod Toolkit covers a comprehensive range of Unix permissions, including chmod, chown, umask, ACLs, and SELinux. It aims to provide mastery of these concepts, not just memorization.

Does Chmod Toolkit offer exam simulations for Linux certifications?

Yes, Chmod Toolkit features three cert-specific exam modes that simulate actual exam methodologies for Linux+ (90 questions, 90 min), LPIC-1 (60 questions, 90 min), and RHCSA (18 hands-on tasks, 3 hours). It allows skipping, flagging, and returning to questions.

How does Chmod Toolkit help users learn permissions effectively?

It utilizes spaced repetition, scheduling reviews based on accuracy to focus on areas needing the most attention. The app also employs eight different question types to keep users engaged and sharp.

What kind of progress tracking is available in Chmod Toolkit?

Chmod Toolkit provides a detailed stats dashboard with interactive charts showing accuracy trends, category strengths, question type performance, and certification readiness. It also includes triple progress rings and daily challenge streaks.

On which Apple devices can Chmod Toolkit be used?

Chmod Toolkit is built for every Apple device, including iPhone with haptic feedback, iPad with full-screen layouts and split view, and Mac with native sidebar navigation and keyboard shortcuts. Progress syncs automatically via iCloud.

Is Chmod Toolkit a subscription-based app?

No, Chmod Toolkit is a one-time purchase with no subscription required. All future updates are included with the initial purchase, ensuring you always have the latest features.

Does Chmod Toolkit require an account or collect user data?

Chmod Toolkit does not require an account to use, and no data leaves your device. Your progress and privacy are protected, as all learning and tracking are done locally.

How frequently is Chmod Toolkit updated?

The app was last updated on April 15, 2026, indicating a commitment to ongoing development and support. Future updates are included with the purchase.