# Locked In: Prep for Data+ — DA0-001 Legacy Study Library > Offline historical study library for retired CompTIA Data+ DA0-001 exam. (iPhone/iPad app by OMAR DANIEL GRAZIANO.) - Source: https://appshunter.io/ios/app/locked-in-prep-for-data-plus/id6771492805 (this page in markdown: same URL + `.md`) - Developer: [OMAR DANIEL GRAZIANO](https://appshunter.io/developer/1896485759) - Category: Education, Reference - Price: Free with in-app purchases - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 17.0 · 5 MB - Languages: American English - Released: 2026-05-27 - Data updated: 2026-09-01 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/locked-in-prep-for-data-plus/id6771492805/reviews.md ## What is Locked In? Locked-In preserves the retired CompTIA Data+ DA0-001 blueprint as an offline historical study library. IMPORTANT DA0-001 is retired. This app is not current Data+ exam preparation and should not be used as your only resource for an active certification attempt. Current candidates should use CompTIA's latest published objectives and current training materials. WHAT'S INCLUDED • Historical coverage of all five DA0-001 domains: Concepts and Environments, Data Mining, Data Analysis, Visualization, and Governance, Quality and Controls • Short lessons with visual explanations for schemas, ETL and ELT, joins, statistics, dashboards, data quality, and governance • Hundreds of original multiple-choice practice questions with explanations • Interactive PBQ-style activities for knowledge review; these are not official CompTIA questions or an exam simulation • A 60-question timed legacy practice set with flagging and final review • Flashcards with spaced repetition and a searchable glossary • Progress by domain, quiz history, bookmarks, personal notes, study streaks, and weak-spot review FREE TO EXPLORE A selection of lessons is available free so you can evaluate the library before purchasing. A single optional, one-time purchase unlocks the remaining lessons and study tools. There is no subscription. PRIVATE BY DESIGN No account is required. The app works offline and stores study progress on your device. It contains no third-party analytics, advertising, or tracking. DISCLAIMER This is independent historical reference material. It does not contain official exam questions and does not predict certification readiness. Not affiliated with, endorsed by, or sponsored by CompTIA. CompTIA and Data+ are registered trademarks of CompTIA, Inc. ## Key features - Historical coverage of Data+ domains - Short lessons with visual explanations - Hundreds of practice questions - Interactive PBQ-style activities - Flashcards with spaced repetition - Progress tracking and weak-spot review ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Data+ Full Unlock | $9.99 | one-time | ## Frequently asked questions about Locked In ### Is Locked In for current Data+ certification exams? No, Locked In preserves the retired CompTIA Data+ DA0-001 blueprint. It is not current Data+ exam preparation and should not be used as your only resource for an active certification attempt. Current candidates should use CompTIA's latest published objectives and current training materials. ### What content does Locked In cover? Locked In covers all five DA0-001 domains: Concepts and Environments, Data Mining, Data Analysis, Visualization, and Governance, Quality and Controls. It includes short lessons, hundreds of practice questions, interactive activities, flashcards, and a glossary. ### How does Locked In track progress? Locked In offers progress tracking by domain, quiz history, bookmarks, personal notes, study streaks, and a weak-spot review feature to help users focus on areas needing improvement. ### Does Locked In require an internet connection? No, Locked In is designed to work offline. It stores all study progress directly on your device, ensuring privacy and accessibility without an internet connection. ### What is the pricing model for Locked In? A selection of lessons is available for free to explore. A single, optional one-time purchase unlocks the remaining lessons and study tools. There is no subscription required. ### Does Locked In have ads? No, Locked In is ad-free. The app is private by design and contains no third-party analytics, advertising, or tracking. ### What devices is Locked In compatible with? Locked In is available for iPhone and iPad devices. It has an age rating of 4+. ### How often is Locked In updated? The latest version of Locked In is 2.0, and it was last updated on August 3, 2026. This indicates a recent update, suggesting ongoing support for the application. ## Version history (last 5 releases) ### 2.2 — 2026-08-27 Practice questions have been rewritten so the answer can no longer be spotted from its shape. Every option in a set now follows the same pattern and a similar length, so the right answer has to be recognised rather than guessed. Question wording and explanations were reviewed alongside it. ### 2.1 — 2026-08-15 Squashed bugs. Enjoy! ### 2.0 — 2026-08-03 • Reframed DA0-001 throughout the app as a retired legacy reference and added clear notices that it is not current Data+ exam preparation. • Clarified timed practice and PBQ-style activities as independent knowledge review, not official exam content or a certification-readiness predictor. • Improved purchase, restore, and entitlement-state handling. • Improved progress persistence, study planning, and flashcard review behavior. • Corrected content and fixed reliability issues across core study screens. ### 1.0.1 — 2026-06-01 Bug fixes and performance improvements. ### 1.0 — 2026-05-28 No release notes. ## More apps by OMAR DANIEL GRAZIANO - [Cycle Cipher](https://appshunter.io/ios/app/cycle-cipher/id6767546105) - [CivBites](https://appshunter.io/ios/app/civbites/id6767999584) - [Decanon](https://appshunter.io/ios/app/decanon/id6768711973) - [Tanksmith](https://appshunter.io/ios/app/tanksmith/id6769517856) - [Roomprint](https://appshunter.io/ios/app/roomprint/id6769752243) - [Liminal: Learn Philosophy](https://appshunter.io/ios/app/liminal-learn-philosophy/id6770075835) All apps by OMAR DANIEL GRAZIANO: https://appshunter.io/developer/1896485759 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-01.*