# CISSP Practice Test 2026 ISC2 vs Prefrontal Lab

The clearest difference is in-app purchases: Prefrontal Lab at none against CISSP Practice Test 2026 ISC2's 5. Prefrontal Lab also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 3 months). CISSP Practice Test 2026 ISC2's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price there is nothing between them.

Both are free to download. CISSP Practice Test 2026 ISC2 sells 5 in-app purchases, starting at $9.99 per 7 days. Prefrontal Lab asks for nothing beyond the download.

CISSP Practice Test 2026 ISC2 ships an update every 3 months, Prefrontal Lab every 3 weeks. The most recent releases landed on October 29, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | CISSP Practice Test 2026 ISC2 | Prefrontal Lab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (136 ratings)](https://appshunter.io/ios/app/cissp-practice-test-2026-isc2/id1501784815/reviews)** | — |
| Number of ratings | **136** | — |
| Positive reviews | 86.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 79 MB | 5 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Thanh Hung](https://appshunter.io/developer/1059077329) | [Ziyu He](https://appshunter.io/developer/1837600075) |

## What reviewers say

### CISSP Practice Test 2026 ISC2

[App page](https://appshunter.io/ios/app/cissp-practice-test-2026-isc2/id1501784815)

Prepare for the CISSP exam with over 1200 practice questions and AI-powered study assistance. This app offers topic-based practice, mock tests, and personalized study plans to help you master the required knowledge and achieve certification.

**Highlights:** 1200+ practice questions, Topic-based practice, Mock tests, Instant feedback, Personalized study plan, AI Study Assistant (Mentora)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CISSP Subscription Weekly | $9.99 | per 7 days |
| CISSP Subscription Monthly | $19.99 | per month |
| CISSP Quarterly Subscription | $39.99 | per 3 months |
| CISSP Subscription Yearly | $69.99 | per year |
| Pro | $9.99 | one-time |


### Prefrontal Lab

[App page](https://appshunter.io/ios/app/prefrontal-lab/id6774438286)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is CISSP Practice Test 2026 ISC2 free?

CISSP Practice Test 2026 ISC2 is free to download, with in-app purchases available.

### Is Prefrontal Lab free?

Prefrontal Lab is free to download, with no in-app purchases.

### Do CISSP Practice Test 2026 ISC2 or Prefrontal Lab have ads?

CISSP Practice Test 2026 ISC2 shows ads; Prefrontal Lab does not.

### Which is updated more often, CISSP Practice Test 2026 ISC2 or Prefrontal Lab?

CISSP Practice Test 2026 ISC2 ships an update every 3 months, and Prefrontal Lab every 3 weeks. Most recently, CISSP Practice Test 2026 ISC2 was updated on October 29, 2026 and Prefrontal Lab on October 31, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*