# Drillster vs ISC2 Official Exam Prep

The clearest difference is review sentiment: ISC2 Official Exam Prep at 69% against Drillster's 0%. ISC2 Official Exam Prep also leads on update cadence (fortnightly vs every 5 weeks). Drillster's advantage is in-app purchases (none vs 5). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ISC2 Official Exam Prep sells 5 in-app purchases, starting at $4.99 per 7 days. Drillster asks for nothing beyond the download.

Drillster ships an update every 5 weeks, ISC2 Official Exam Prep fortnightly. The most recent releases landed on September 16, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Drillster | ISC2 Official Exam Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (407 ratings)](https://appshunter.io/ios/app/isc2-official-exam-prep/id1555533017/reviews)** |
| Number of ratings | — | **407** |
| Positive reviews | 0.0% of reviews | **69.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 43 MB | 87 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Drillster BV](https://appshunter.io/developer/429175118) | [learnZapp](https://appshunter.io/developer/435622455) |

## What reviewers say

### Drillster

[App page](https://appshunter.io/ios/app/drillster/id429175115)

This educational app enhances knowledge retention through adaptive learning, microlearning, and instant feedback. It features a new drill player with improved visuals and gamification, helping users track their progress and reach proficiency.

**Highlights:** Adaptive learning methodology, Microlearning approach, Instant feedback after exercises, Progress tracking and proficiency goals, Improved visual display for media, Gamification elements

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

**In-app purchases:** none


### ISC2 Official Exam Prep

[App page](https://appshunter.io/ios/app/isc2-official-exam-prep/id1555533017)

Prepare for CISSP, CCSP, and SSCP certification exams with official study materials. Access thousands of questions, flashcards, and glossary terms. Track your progress and build custom practice tests to identify and improve weak areas.

**Highlights:** Thousands of exam-specific questions, Detailed explanations, Flashcards and glossary, Readiness score, Custom test builder, Progress tracker, Mock exams

**Features:** Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Access - 1 Week | $4.99 | per 7 days |
| All Access - 1 Month | $16.99 | per month |
| All Access - 3 Months | $44.99 | per 3 months |
| All Access - 6 Months | $79.99 | per 6 months |
| All Access - 1 Year | $139.99 | per year |


## Frequently asked questions

### Is Drillster free?

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

### Is ISC2 Official Exam Prep free?

ISC2 Official Exam Prep is free to download, with in-app purchases available.

### Do Drillster or ISC2 Official Exam Prep have ads?

Neither Drillster nor ISC2 Official Exam Prep shows ads.

### Which is updated more often, Drillster or ISC2 Official Exam Prep?

Drillster ships an update every 5 weeks, and ISC2 Official Exam Prep fortnightly. Most recently, Drillster was updated on September 16, 2026 and ISC2 Official Exam Prep on September 26, 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.*