# Viz.ai vs Stroke Certified RN Test Prep

The clearest difference is review sentiment: Stroke Certified RN Test Prep at 75% against Viz.ai's 14%. Stroke Certified RN Test Prep also leads on rating (4.8 vs 4.2) and ratings volume (710 vs 36). Viz.ai's advantage is in-app purchases (none vs 4). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Stroke Certified RN Test Prep sells 4 in-app purchases, starting at $39.99 per month. Viz.ai asks for nothing beyond the download.

Stroke Certified RN Test Prep holds the better App Store score, 4.8 against 4.2. That said, the two scores are not equally well evidenced: Stroke Certified RN Test Prep has 710 ratings behind it against 36, so its average is the more settled of the two. Written reviews point the same way: 14% of Viz.ai's written reviews are positive against 75% of Stroke Certified RN Test Prep's.

Viz.ai ships an update fortnightly, Stroke Certified RN Test Prep every 3 weeks. Both last shipped on November 6, 2026.

## The numbers

| Metric | Viz.ai | Stroke Certified RN Test Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (36 ratings)](https://appshunter.io/ios/app/vizai/id1222399372/reviews) | **[4.8 (710 ratings)](https://appshunter.io/ios/app/stroke-certified-rn-test-prep/id1254162746/reviews)** |
| Number of ratings | 36 | **710** |
| Positive reviews | 14.3% of reviews | **75.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Best chart rank | — | **#186** |
| Size | 56 MB | 64 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | +4 |
| Developer | [Viz.ai, Inc.](https://appshunter.io/developer/1222399371) | [Springer Publishing Company](https://appshunter.io/developer/776168476) |

## What reviewers say

### Viz.ai

[App page](https://appshunter.io/ios/app/vizai/id1222399372)

This AI-powered telehealth platform assists clinicians in detecting critical diseases like stroke and hemorrhages using advanced imaging. It automates CT perfusion and provides mobile imaging with HIPAA-compliant messaging to streamline workflows across specialties.

**Highlights:** AI-powered disease detection, Automated CT perfusion imaging, Mobile imaging capabilities, HIPAA-compliant messaging, Remote installation, Workflow synchronization

**Features:** macOS Compatibility

**In-app purchases:** none


### Stroke Certified RN Test Prep

[App page](https://appshunter.io/ios/app/stroke-certified-rn-test-prep/id1254162746)

**Currently charting:** #186 Top Grossing · Medical (US App Store)

Prepare for your Stroke Care Registered Nurse (SCRN) certification exam with this comprehensive study guide. It offers hundreds of practice questions with detailed explanations, performance tracking, and helpful tips to maximize your score. Covers all essential SCRN exam categories.

**Highlights:** 425+ practice questions with explanations, Detailed performance tracking, Exam score maximization tips, Unlimited access to all categories, Comprehensive SCRN exam content

**Features:** Apple Wallet, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stroke Certified RN 1 Month | $39.99 | per month |
| Stroke Certified RN 3 Month | $79.99 | per 3 months |
| Stroke Certified RN Yearly | $149.99 | per year |
| Stroke Care Exam - Premium | $49.99 | one-time |


## Frequently asked questions

### Is Viz.ai free?

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

### Is Stroke Certified RN Test Prep free?

Stroke Certified RN Test Prep is free to download, with in-app purchases available.

### Which has better reviews, Viz.ai or Stroke Certified RN Test Prep?

Stroke Certified RN Test Prep is rated higher. Viz.ai averages 4.2 out of 5 from 36 ratings, while Stroke Certified RN Test Prep averages 4.8 from 710 ratings.

### Do Viz.ai or Stroke Certified RN Test Prep have ads?

Neither Viz.ai nor Stroke Certified RN Test Prep shows ads.

### Which is updated more often, Viz.ai or Stroke Certified RN Test Prep?

Viz.ai ships an update fortnightly, and Stroke Certified RN Test Prep every 3 weeks. Most recently, Viz.ai was updated on November 6, 2026 and Stroke Certified RN Test Prep on November 6, 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.*