# CEN Exam Prep App vs STEM Prep Tutoring

The clearest difference is in-app purchases: STEM Prep Tutoring at none against CEN Exam Prep App's 2. CEN Exam Prep App's advantage is update cadence (every 3 months vs every 10 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. CEN Exam Prep App sells 2 in-app purchases, starting at $24.99 per month. STEM Prep Tutoring asks for nothing beyond the download.

CEN Exam Prep App ships an update every 3 months, STEM Prep Tutoring every 10 months. The most recent releases landed on September 17, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | CEN Exam Prep App | STEM Prep Tutoring |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (115 ratings)](https://appshunter.io/ios/app/cen-exam-prep-app/id1565144579/reviews)** | — |
| Number of ratings | **115** | — |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 10 months |
| Monetization | Free with in-app purchases | — |
| Size | 35 MB | 226 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [MastrAPI](https://appshunter.io/developer/1618627725) | [STEM Consulting Inc](https://appshunter.io/developer/1815470791) |

## What reviewers say

### CEN Exam Prep App

[App page](https://appshunter.io/ios/app/cen-exam-prep-app/id1565144579)

Prepare for the Certified Emergency Nurse (CEN) exam with practice questions and detailed analytics. The app is updated for the 2026 exam blueprint, offering over 900 questions and progress tracking to help you identify strengths and weaknesses.

**Highlights:** Over 900 practice questions, 2026 exam blueprint alignment, Detailed performance analytics, Track strengths and weaknesses, Compare scores to community average, Refreshed question bank and explanations

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CEN Exam Prep & Practice | $24.99 | per month |
| Lifetime | $99.99 | one-time |


### STEM Prep Tutoring

[App page](https://appshunter.io/ios/app/stem-prep-tutoring/id6746155613)

**In-app purchases:** none


## Frequently asked questions

### Is CEN Exam Prep App free?

CEN Exam Prep App is free to download, with in-app purchases available.

### Is STEM Prep Tutoring free?

STEM Prep Tutoring is free to download, with no in-app purchases.

### Do CEN Exam Prep App or STEM Prep Tutoring have ads?

Neither CEN Exam Prep App nor STEM Prep Tutoring shows ads.

### Which is updated more often, CEN Exam Prep App or STEM Prep Tutoring?

CEN Exam Prep App ships an update every 3 months, and STEM Prep Tutoring every 10 months. Most recently, CEN Exam Prep App was updated on September 17, 2026 and STEM Prep Tutoring on September 25, 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.*