# CISSP Vault: CAT Exam Prep — Adaptive CAT · 4,063 Questions

> Adaptive CAT · 4,063 Questions (iPhone/iPad app by 磊 崔.)

- Source: https://appshunter.io/ios/app/cissp-vault-cat-exam-prep/id6788394383 (this page in markdown: same URL + `.md`)
- Developer: [磊 崔](https://appshunter.io/developer/6787310721)
- Category: Education, Reference
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 70 MB
- Languages: English, Japanese, Chinese
- Released: 2026-07-13
- Data updated: 2026-09-09
- User reviews in markdown: https://appshunter.io/ios/app/cissp-vault-cat-exam-prep/id6788394383/reviews.md

## What is CISSP Vault?

Train for CISSP with an adaptive CAT-style exam—not just another fixed mock.

CISSP Vault combines 4,063 practice questions, structured explanations, and an adaptive exam engine in one focused study app. Study in English, Japanese, or Simplified Chinese, and switch any translated question to the original English with one tap.

ADAPTIVE CAT-STYLE SIMULATOR
• 100–150 questions with a three-hour clock
• Difficulty adjusts after every answer
• Forward-only answering and blueprint-weighted coverage across all 8 domains
• Ability trajectory and domain proficiency report after each run

4,063 PRACTICE QUESTIONS
• Broad coverage of all 8 current CISSP domains
• Timed mock exams, domain drills, and focused practice
• Weak-area review, mistakes, bookmarks, and Question of the Day

CHOICE-BY-CHOICE EXPLANATIONS
• Why the correct answer is right
• Why each wrong option is tempting or incorrect
• Key Takeaways: the concept being tested
• Exam Technique: how to identify the intended answer
• Mindset Traps: common judgment errors under exam pressure

TRACK REAL PROGRESS
• Readiness score and domain mastery
• Accuracy trends, exam history, and learning streaks
• Daily reminders and targeted review
• No account required
• Questions and explanations work offline

100 QUESTIONS FREE
Answer your first 100 questions at no cost. Then unlock the complete question bank and all features with one lifetime purchase. No subscription and no recurring fee.

CISSP® is a registered trademark of ISC2, Inc. This app is an independent study aid and is not affiliated with, endorsed by, or sponsored by ISC2.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime Access | $49.99 | one-time |



## Version history (last 5 releases)

### 1.2.0 — 2026-08-28

Added full Japanese and Simplified Chinese support, plus a one-tap English original toggle for every translated question. Refined the home, exam, analysis, and explanation layouts, and improved the adaptive CAT experience.

### 1.1.2 — 2026-07-26

Minor improvements and refinements.

### 1.1.1 — 2026-07-24

- Free trial expanded: the first 100 questions are now free (up from 30)
- Question-quality update: fixed 190+ items (truncated stems, formatting artifacts, typos) - thank you to everyone who reported issues!
- Minor fixes and polish

### 1.1 — 2026-07-16

• Free trial is now 30 questions with no time limit — sample the bank at your own pace.
• Smoother rating prompt after you ace an exam.
• Minor fixes and polish.

### 1.0 — 2026-07-13

No release notes.

## More apps by 磊 崔

- [Tomaco: Remote Desktop](https://appshunter.io/ios/app/tomaco-remote-desktop/id6787690528)

All apps by 磊 崔: https://appshunter.io/developer/6787310721

## Related topics

[examproof](https://appshunter.io/ios/topics/examproof)

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*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 2026-09-09.*