Locked In: Prep for CySA+

Locked-In is a bite-sized study companion for the CompTIA Cybersecurity Analyst (CySA+) CS0-003 exam. Built for people who study in 10-minute windows on the train, on lunch, or between meetings — every lesson is short, focused, and ends with a quick-check so you know what stuck. WHAT'S INSIDE • All 4 CS0-003 exam domains, broken into bite-sized lessons • Visual diagrams for every key concept (SOC workflow, MITRE ATT&CK, Kill Chain, Diamond Model, CVSS, IR lifecycle, and more) • Inline quick-checks at the end of each lesson • 100+ practice questions, organized by domain and difficulty • Performance-based questions (PBQs) — drag-and-drop, matching, and ordering • A full 85-question, 165-minute timed mock exam with flag-for-review and a final review screen • Flashcard deck of must-know terms with spaced repetition (SM-2) • Searchable glossary covering every acronym you'll see on test day • Progress tracking, streaks, bookmarks, and personal notes • Weak-spot review that surfaces the topics you keep missing WHO IT'S FOR • SOC analysts and security pros preparing for CySA+ • Career changers studying CySA+ alongside a day job • Students supplementing a course or boot camp • Professionals refreshing before a recertification window • Anyone who learns better in short, focused sessions than long lectures WHY LOCKED-IN • Works fully offline — no account, no tracking, no ads • One-time unlock, no subscription • Built by an indie developer, not a content mill PRIVACY Locked-In stores your progress on-device. No analytics, no third-party SDKs, no data sold or shared. DISCLAIMER Not affiliated with, endorsed by, or sponsored by CompTIA. CompTIA® and CySA+® are registered trademarks of CompTIA, Inc.