Locked In vs 8

Locked-In is an independent study companion for the CySA+ CS0-004 exam. It is designed for short, focused study sessions and works without an account, ads, analytics, or third-party tracking. STUDY CONTENT • 91 concise lessons across all 15 CS0-004 objective headings in four domains • 91 inline quick checks, one at the end of every lesson • Visual explanations for selected concepts including security operations, threat intelligence, vulnerability management, incident response, and reporting • 100 flashcards with optional spaced review • A searchable glossary with 137 selected terms and acronyms • Search, progress tracking, study streaks, bookmarks, and personal notes PRACTICE • 121 original multiple-choice questions organized by domain • 20 tap-driven PBQ-style activities for categorizing, ordering, and matching practice • An 85-question, 165-minute multiple-choice 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 Timed Practice and the PBQ-style activities are separate, original app content. They are not official CompTIA questions, a reproduced exam blueprint, or an exam simulation. The app's 80% practice target is not a CompTIA scaled score, passing prediction, or claim about the official passing standard. FREE TO TRY The free tier includes 16 complete lessons, a curated 10-question quiz sampler, 30 Domain 1 flashcards, two PBQ-style preview activities, the complete 137-term glossary, and on-device study tools for included content. ONE-TIME FULL UNLOCK The non-consumable Locked-In Full Unlock opens all 91 lessons, quiz access to the full 121-question bank, all 20 PBQ-style activities, all 100 flashcards, and the 85-question Timed Practice mode. There is no subscription. 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 CySA+® are registered trademarks of CompTIA, Inc. Locked-In is an independent study aid. Always verify current exam policies and objectives with CompTIA.

Learn GRC, security, and compliance in 8-minute bites. 8-bit Bytes turns dense standards into daily, bite-size lessons — written exclusively from authoritative sources (NIST, ISO, AICPA, RFCs, official regulations) with citations down to the document section, and links to the originals in every lesson. 116 LESSONS ACROSS 18 TOPICS • Foundations: what GRC actually is, SOC 2, risk management, policy writing, ISO 27001 • Core domains: identity & access, incident response, business continuity, vendor risk, zero trust, cloud security, privacy • Control catalogs: NIST SP 800-53 and 800-171, ISO 22301, 27701, 27017, and 20000-1 • Audit & assurance: IT audit fundamentals, SOC 1, SOC 3, SOX IT general controls • Regulated regimes: PCI DSS, HIPAA, CMMC, DORA, NERC CIP, Cyber Essentials, Essential Eight, HITRUST, and the EU AI Act • Specialist tracks: privileged access & workload identity, Apple device management STUDY FOR REAL CERTIFICATIONS Lessons map to official exam objectives — CompTIA Security+, ISACA CISM and CISA, Microsoft SC-300, Okta Certified Professional, and Apple's IT certifications — with per-objective coverage you can track. LISTEN LIKE A PODCAST Studio-quality narration with read-along word highlighting, lock-screen controls, resume markers, offline downloads, and adjustable speed. Technical terms are pronounced the way practitioners say them. QUIZ YOURSELF PROPERLY 1,000+ questions: a quick check after every lesson, drawn from rotating pools so retakes actually test you, plus full chapter quizzes. MAKE IT YOURS Bookmarks, highlights, and notes collected in a Saved tab. Dark mode and adjustable text size. Streaks to keep you honest — and Byte & Co., a fictional company you build as your knowledge grows. HONEST BY DESIGN Lessons are AI-drafted exclusively from verified authoritative sources and independently fact-checked; every lesson lists its sources with links. If it is not in the source, it is not in the lesson. INDEPENDENT APP — NOT A GOVERNMENT ENTITY 8-bit Bytes is an independent educational app. It is not affiliated with, endorsed by, or representing any government entity, standards body, or certification provider. Certification names are trademarks of their respective owners, used for identification only. OFFICIAL SOURCES All government and regulatory material in the app comes from, and links to, the official publishers: • NIST publications — https://csrc.nist.gov • HIPAA (U.S. HHS) — https://www.hhs.gov/hipaa • CMMC (U.S. DoD CIO) — https://dodcio.defense.gov/cmmc/ • EU law: GDPR, DORA, EU AI Act — https://eur-lex.europa.eu • SOX (U.S. SEC) — https://www.sec.gov • Cyber Essentials (UK NCSC) — https://www.ncsc.gov.uk • Essential Eight (Australian ACSC) — https://www.cyber.gov.au • NERC CIP — https://www.nerc.com • ISO standards — https://www.iso.org • AICPA (SOC reports) — https://www.aicpa-cima.com • PCI DSS — https://www.pcisecuritystandards.org • IETF RFCs — https://www.rfc-editor.org PRICING Foundations (28 lessons) is free with ads. Unlock any other section for $0.99, or get All Access — every section, no ads, forever — for $3.99. The first lesson of every topic is always free to try.