# Quality Inspector Exam Prep vs Shield Study

The clearest difference is update cadence: Shield Study at every 3 days against Quality Inspector Exam Prep's every 4 months. Quality Inspector Exam Prep's advantage is iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Quality Inspector Exam Prep sells 9 in-app purchases, starting at $8.99 per 7 days and Shield Study sells 2 in-app purchases, starting at $8.00 per month. Whichever you choose, the download price is not the number that matters.

Quality Inspector Exam Prep ships an update every 4 months, Shield Study every 3 days. Both last shipped on October 4, 2026.

## The numbers

| Metric | Quality Inspector Exam Prep | Shield Study |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/shield-study/id6742087820/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 days** |
| Monetization | — | Free with in-app purchases |
| Size | 50 MB | 18 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Exam Prep OU](https://appshunter.io/developer/1689642184) | [Corey Gillespie](https://appshunter.io/developer/1796727084) |

## What reviewers say

### Quality Inspector Exam Prep

[App page](https://appshunter.io/ios/app/quality-inspector-exam-prep/id6742052227)

**Features:** macOS Compatibility

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CQI Weekly Full Access | $8.99 | per 7 days |
| CQI Monthly Full Access | $24.99 | per month |
| CQI Monthly Full Access | $34.99 | per month |
| CQI Quarterly Full Access | $55.99 | per 3 months |
| CQI Quarterly Full Access | $59.99 | per 3 months |
| CQI Semiannual Full Access | $75.99 | per 6 months |
| CQI Semiannual Full Access | $79.99 | per 6 months |
| CQI Annual Full Access | $109.99 | per year |
| CQI Annual Full Access | $119.99 | per year |


### Shield Study

[App page](https://appshunter.io/ios/app/shield-study/id6742087820)

Prepare for police promotional exams with a quiz-based study tool. Test your knowledge on departmental policies and Maryland Law, and track your progress. Currently supports the Baltimore Police Department.

**Highlights:** Quiz-based study tool, Test knowledge on policies, Track progress, Maryland Law questions, Supports Baltimore Police Department

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription Plan | $8.00 | per month |
| Yearly Subscription | $40.00 | per year |


## Frequently asked questions

### Is Quality Inspector Exam Prep free?

Quality Inspector Exam Prep is free to download, with in-app purchases available.

### Is Shield Study free?

Shield Study is free to download, with in-app purchases available.

### Do Quality Inspector Exam Prep or Shield Study have ads?

Neither Quality Inspector Exam Prep nor Shield Study shows ads.

### Which is updated more often, Quality Inspector Exam Prep or Shield Study?

Quality Inspector Exam Prep ships an update every 4 months, and Shield Study every 3 days. Most recently, Quality Inspector Exam Prep was updated on October 4, 2026 and Shield Study on October 4, 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.*