Chmod Toolkit
Scan & fix file permissions
Free · In‑App Purchases
Big update coming soon: New ways to master chmod, new quiz questions, improved Shortcuts, and more. Upgrade to the Pro introductory price before it goes up.
Chmod Toolkit is the professional Unix permissions tool for iPhone, iPad, and Mac. Calculate chmod values instantly, describe permissions in plain English, troubleshoot real-world problems, and audit file security — all on-device.
Whether you're a sysadmin managing production servers, a student learning Unix for the first time, or a developer debugging permission errors — Chmod Toolkit puts the answers at your fingertips.
POWERFUL CALCULATOR
• Set permissions with visual pickers, numeric input (755), or symbolic input (rwxr-xr-x)
• Real-time conversion between numeric, symbolic, and plain English
• Special bits support: setuid, setgid, and sticky bit
• File vs. directory context with tailored explanations
• Quick presets for common patterns (644, 755, 600, 700, 777)
• One-tap copy of the complete chmod command
• Compare two permission sets side by side
• Save bookmarks for permissions you use often
NEW: CHMODIQ — PLAIN ENGLISH PERMISSIONS
• Describe what you need in everyday language — "only the owner can read and write"
• Get the exact chmod value instantly
• Suggestion chips for common scenarios
• Built-in mini calculator for quick verification
NEW: TROUBLESHOOT
• Browse curated solutions for real-world permission problems
• 9 categories: SSH, web servers, Docker, scripts, shared directories, filesystems, security layers, Git, and common mistakes
• Search by keyword or error message to find your fix fast
• Pro: Copyable fix commands and prevention tips
LEARN & PRACTICE
• 6 categories of structured lessons covering basics to advanced topics
• Comprehensive quiz system with 5 question types
• Daily Challenge — one question every day, keep your streak alive
• Earn XP, level up, and track your learning streaks
• Share your results Wordle-style with friends and study groups
• Spaced repetition prioritizes questions you need to review
• Smart notifications: streak reminders, daily challenge nudges, and review alerts
• Choose your timer speed: Chill (60s), Relaxed (30s), Standard (15s), or Speed (8s)
• On-device explanations for every answer (Pro)
• Stats dashboard to identify weak areas
REAL-WORLD EXAMPLES
• Dozens of permission patterns organized by use case
• Standard files, executables, directories, web files, sensitive files, and special cases
• Each example includes numeric value, symbolic notation, use case, and security notes
PRO: ERROR DOCTOR
• Paste terminal error messages for instant diagnosis
• Pattern matching detects common permission errors
• Pro: Deeper on-device analysis with alternative fixes and prevention tips
PRO: SECURITY SCANNER
Unlock professional security scanning tools with a one-time purchase.
• Paste terminal output (ls -la) for instant analysis
• Scan screenshots with OCR — snap a photo of terminal output
• Import text files with permission listings
• Mac: Drag-and-drop folder scanning with recursive analysis
• 24 security check categories covering 100+ file types
• Based on OWASP, CIS Benchmarks, NIST 800-53, and PCI DSS standards
• Smart fix commands — copy ready-to-paste chmod fixes
• Batch "Fix All" script generation
• Export results as CSV for audit reports
PRO: COMPARE PERMISSIONS
• Diff two permission sets with a visual comparison
• Instantly see what changed between configurations
WIDGETS
• Interactive calculator widget in medium and large sizes — toggle permissions from your Home Screen
• Quick reference cards in small and medium sizes
• Lock Screen widgets for at-a-glance permission info
• Control Center widget for instant access
BUILT FOR EVERY PLATFORM
• iPhone: Touch-optimized with haptic feedback and sound effects
• iPad: Full-screen layouts with split view support
• Mac: Native sidebar navigation, keyboard shortcuts, drag-and-drop
No account required. No data leaves your device. Your permissions, your privacy.
Ratings & Reviews
NEW: Flashcard Mode (Pro)
• Quick-fire memorization with 3D card flip animation
• Self-rate with "Got It" or "Review Again" — builds a review pile
• Streak tracking and confetti on deck completion
• Available from the Learn tab
NEW: More Quiz Questions
• SELinux: modes, contexts, restorecon, AVC denials, port labeling
• find -perm: exact vs prefix matching, SUID/SGID audit commands
• Troubleshooting: Docker UID mapping, NFS root_squash, recursive chmod disasters
IMPROVED: Siri Shortcuts
• Shortcuts work with voice
• New "Lookup Common Permission" shortcut added
IMPROVED: Troubleshoot Search
• "Try asking ChmodIQ" fallback when keyword search returns no results
• Pre-populates ChmodIQ with your search text
IMPROVED: Purchase Experience
• Purchase button always visible — no more scrolling to find it
• Mac paywall scrolling fixed
Bug Fixes
• Fixed tap targets on all card-style buttons across the app
• Constrained button widths on Mac for consistent appearance
• Fixed environment object crash on Mac paywall
The developer, Robert Frederique, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Robert Frederique
- Size
- 31.2 MB
- Category
- Developer Tools
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later. - Apple Vision
Requires visionOS 1.0 or later.
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Pro Features $3.99
- Copyright
- © 2025-2026 Robert Frederique