Comparison

CompTIA A+ & Security + Prep vs Locked In

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

CompTIA A+ & Security + Prep

Prepare for CompTIA certification exams with a personalized study plan. Practice with thousands of questions, track your progress, and compare your scores to the community average to boost your confidence and pass on your first attempt.

Highlights
  • Personalized study plan
  • 5000+ practice questions
  • Track strengths and weaknesses
  • Detailed test statistics
  • Compare scores to community average
  • Choose exam topics
Features
Read full description

Pass your CompTIA exams with flying colors! Boost your confidence in passing the first time with our mobile app and a personal study plan based on your current skill and requirements. Based in Downers Grove, Illinois, CompTIA issues vendor-neutral professional certifications in over 120 countries. The organization releases over 50 industry studies annually to track industry trends and changes. Over 2.2 million people have earned CompTIA certifications since the association was established. Key features: - Choose from different topics required to receive a certification - Practice with 5000+ questions - Track your strengths and weaknesses within Stats section of the app - Study detailed statistics of every test you take - Compare your score to the community average for almost any type of exam - - - - Purchases, subscriptions and terms You need to buy a lifetime access or subscribe to get access to all features, courses and questions. The cost of the purchase is charged to your iTunes account. Subscriptions are auto-renewable and are billed at the rate and period selected depending on the subscription plan. Users’ accounts are charged for auto-renewal within 24 hours prior to the end of the current period. Subscriptions can be managed and auto-renewal can be turned off in Account Settings in iTunes after the purchase. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. Terms of use: https://mastrapi.com/terms.html Privacy policy: https://mastrapi.com/policy.html

About

Locked In

Prepare for the CompTIA Linux+ XK0-006 exam with this offline study companion. It offers concise lessons, practice questions, flashcards, and mock exams covering all exam domains. Track your progress and review weak topics to ensure readiness.

Highlights
  • Concise lessons by exam domain
  • Practice questions with explanations
  • Timed mock exams
  • Command-focused flashcards
  • Searchable glossary
  • Progress tracking and study plan
Features
Read full description

Locked-In is a focused study companion for the CompTIA Linux+ XK0-006 exam. It is built for short sessions, with concise lessons, quick checks, practice, and review tools that work fully offline. WHAT'S INCLUDED - 60 lessons across all five XK0-006 domains: System Management (23%), Services and User Management (20%), Security (18%), Automation, Orchestration and Scripting (17%), and Troubleshooting (22%) - One topic per published objective, all 29 of them, so you can study against the blueprint - Coverage of the areas new to XK0-006, including virtualization with KVM and QEMU, containers with Docker and Podman, Python basics, Git, and the responsible use of AI - Visual aids for the boot process, the filesystem hierarchy, permissions, systemd, LVM, RAID, networking, SELinux, containers, and the virtualization stack - Inline quick checks at the end of every lesson - 435 unique multiple-choice practice questions with explanations, weighted to match the published domain percentages - Scenario and PBQ-style categorization, ordering, and matching activities - A 90-question, 90-minute timed mock exam with flagging, navigation, and a final review screen - Command-focused flashcards with spaced repetition - A searchable glossary covering the official CompTIA Linux+ acronym list and key concepts - Progress by domain, quiz history, study streaks, bookmarks, personal notes, weak-topic review, and an optional study plan FREE PREVIEW AND FULL UNLOCK A starter selection of lessons is free so you can evaluate the library first. A single one-time purchase unlocks the remaining lessons, the full question bank, and every study mode. There is no subscription and no account. IMPORTANT SCOPE NOTE Practice questions and PBQ-style activities are original study material, not official CompTIA exam items. The timed set is a study experience, not a reproduction of the live exam. Verify the current objectives, format, and policies directly with CompTIA. PRIVACY Study progress is stored on your device. The app requires no account, contains no advertising or third-party analytics, and does not sell or share personal data. Locked-In is not affiliated with, endorsed by, or sponsored by CompTIA, Inc. CompTIA and Linux+ are trademarks of CompTIA, Inc. Linux is a registered trademark of Linus Torvalds. Locked-In is an independent study aid and does not guarantee exam results.

Screenshots

CompTIA A+ & Security + Prep4 screens
Locked In4 screens

Verdict

The call

The clearest difference is ratings volume: CompTIA A+ & Security + Prep at 2.2K against Locked In's 1. CompTIA A+ & Security + Prep also leads on iOS requirement (13.0 vs 17.0). Locked In's advantage is rating (5.0 vs 4.7) and update cadence (every 2 weeks vs every 5 weeks). On price, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. CompTIA A+ & Security + Prep sells 2 in-app purchases, starting at $24.99 per month and Locked In sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Locked In holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: CompTIA A+ & Security + Prep has 2.2K ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

CompTIA A+ & Security + Prep ships an update every 5 weeks, Locked In every 2 weeks. The most recent releases landed on October 1, 2026 and October 2, 2026 respectively.

Scorecard4 real differences · 6 level
CompTIA A+ & Security + Prep versus Locked In: the parameters behind the verdict, then further details
ParameterCompTIA A+ & Security + PrepLocked In
PriceFreeFree
Rating4.7 (2.2K ratings)5.0 (1 ratings) — better
Positive reviews31.0% of reviews—
Number of ratings2.2K — better1
Update frequencyEvery 5 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPodiPhone, iPad
Requires iOS13.0 — better17.0
Further details — not scored
Size36 MB5 MB
Age rating4+4+
DeveloperMastrAPIOMAR DANIEL GRAZIANO

Customer experience

CompTIA A+ & Security + Prep

All ratings2,170 ratings
Positive93.0%
Neutral2.3%
Negative4.7%
Written reviews58 reviews
Positive31.0%
Neutral12.1%
Negative56.9%

Locked In

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

CompTIA A+ & Security + Prep

Reported bugs

4 issues
  • Questions referencing missing pictures
  • Incorrect answers and explanations
  • Subscription issues across devices
  • Reporting feature not functioning

Requested features

4 requests
  • Ability to target specific exam objectives
  • Dark mode option
  • More zoom options
  • Improved exam version tracking

Locked In

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

CompTIA A+ & Security + Prep

Subscriptions1
  • Monthly with Trial7 Days trial$24.991 Month
One-time1
  • Lifetime$99.99
1 purchases

Locked In

One-time1
  • Linux+ Full Unlock$9.99

Questions

Is CompTIA A+ & Security + Prep free?
CompTIA A+ & Security + Prep is free to download, with in-app purchases available.
Is Locked In free?
Locked In is free to download, with in-app purchases available.
Which has better reviews, CompTIA A+ & Security + Prep or Locked In?
Locked In is rated higher. CompTIA A+ & Security + Prep averages 4.7 out of 5 from 2.2K ratings, while Locked In averages 5.0 from 1 ratings.
Do CompTIA A+ & Security + Prep or Locked In have ads?
Neither CompTIA A+ & Security + Prep nor Locked In shows ads.
Which is updated more often, CompTIA A+ & Security + Prep or Locked In?
CompTIA A+ & Security + Prep ships an update every 5 weeks, and Locked In every 2 weeks. Most recently, CompTIA A+ & Security + Prep was updated on October 1, 2026 and Locked In on October 2, 2026.

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