iCTF vs Locked In

Learn or sharpen your security skills with a mobile CTF, quiz generator, and fundamentals section. iCTF values your privacy. ZERO data is collected from the app; all analytics and user achievement tracking is performed locally and encrypted. All of your data stays with you, on your phone. INTERACTIVE SECURITY CHALLENGES Build practical cybersecurity knowledge through engaging Capture The Flag (CTF) challenges. Explore cryptography, web application security, digital forensics, code analysis, network protocols, and more. Each challenge teaches real skills used by security professionals to protect systems and data. BUILT-IN TERMINAL EMULATOR Practice command-line skills with a fully functional terminal featuring 40+ Unix commands. Navigate the virtual filesystem, analyze files, decode data, and solve puzzles in a safe learning environment. Includes cat, grep, find, base64, xxd, md5sum, sha256sum, and many more. CYBERQUIZZER - CAREER PREP Prepare for cybersecurity career interviews with comprehensive study modules: • Security Operations: Active Directory, authentication protocols, system administration • Security Engineering: Architecture design, threat modeling, secure development • Hardware Security: Embedded systems, firmware analysis, IoT security concepts • Defense & Response: Incident handling, log analysis, digital forensics Each question includes detailed explanations with examples and industry best practices. PROGRESSIVE LEARNING PATH • Difficulty levels from Beginner to Expert • Hint system to guide your learning • Solution explanations after practice attempts • Progress tracking across all modules • Earn points and celebrate achievements SAFE LEARNING ENVIRONMENT All challenges run in a completely sandboxed environment on your device. Learn security concepts safely — everything stays within the app with no external connections required. FEATURES - 10+ educational challenges across 8 security domains - 100+ career interview preparation questions - Interactive terminal with virtual filesystem - Code analysis sandbox for learning - Works offline — no internet required - Dark theme for comfortable extended study - Progress saved locally on your device PERFECT FOR • IT professionals expanding their security knowledge • Students studying for cybersecurity certifications • Career changers preparing for security roles • Technology enthusiasts exploring information security • Anyone building defensive security skills Begin your cybersecurity education today. Download iOScTF and start learning!

Locked-In is an independent study companion for the Network+ N10-009 exam. It is designed for short, focused study sessions and works without an account, ads, analytics, or third-party tracking. STUDY CONTENT • 76 lessons across all five N10-009 domains • 76 inline quick checks, one at the end of every lesson • Visual explanations for selected concepts including OSI, subnetting, VLANs, routing, DNS, DHCP, wireless, security, and troubleshooting • 102 flashcards with spaced review • A searchable glossary with 89 terms • Search, progress tracking, study streaks, bookmarks, and personal notes PRACTICE • 106 original multiple-choice questions organized by domain • 16 tap-driven PBQ-style activities for categorizing, ordering, and matching • A 90-question, 90-minute timed practice mode with checkpointing, flag-for-review, a navigation grid, and results review • A weak-spot review queue that reschedules missed questions and flashcards The timed practice and PBQ-style activities are original app content. They are not official CompTIA questions, a reproduced exam blueprint, or an exam simulation. The app uses an 80% practice target; this is not a CompTIA scaled score or a claim about the passing standard. FREE TO TRY The free tier includes 14 complete lessons, quizzes of up to 10 questions, 27 Domain 1 flashcards, two PBQ-style preview activities, the complete 89-term glossary, and on-device progress tools. ONE-TIME FULL UNLOCK The non-consumable Locked-In Full Unlock opens all 76 lessons, larger quizzes using the full 106-question bank, all 16 PBQ-style activities, all 102 flashcards, and the 90-question timed practice mode. There is no subscription. Family Sharing is enabled for the purchase. OFFLINE AND PRIVATE Lessons, questions, activities, flashcards, glossary content, notes, and progress are bundled and stored on-device. Product loading, buying, and restoring use Apple's App Store services and require a network connection. DISCLAIMER Not affiliated with, endorsed by, or sponsored by CompTIA. CompTIA® and Network+® are registered trademarks of CompTIA, Inc. Locked-In is an independent study aid. Always verify current exam policies and objectives with CompTIA.