# MRI Registry Compass vs Spintuition

The clearest difference is rating: MRI Registry Compass at 5.0 against Spintuition's 4.5. MRI Registry Compass also leads on iOS requirement (15.1 vs 17.0). Spintuition's advantage is in-app purchases (none vs 2) and update cadence (every 4 days vs monthly). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. MRI Registry Compass sells 2 in-app purchases, starting at $24.99 per month. Spintuition asks for nothing beyond the download.

MRI Registry Compass holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

MRI Registry Compass ships an update monthly, Spintuition every 4 days. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | MRI Registry Compass | Spintuition |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/mri-registry-compass/id6775102858/reviews)** | [4.5 (2 ratings)](https://appshunter.io/ios/app/spintuition/id6813756211/reviews) |
| Number of ratings | **3** | 2 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 days** |
| Monetization | Freemium | **Free** |
| Size | 45 MB | 5 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [MADEHA LLC](https://appshunter.io/developer/1896719453) | [BRIAN ANDREW HARGREAVES](https://appshunter.io/developer/6813756693) |

## What reviewers say

### MRI Registry Compass

[App page](https://appshunter.io/ios/app/mri-registry-compass/id6775102858)

Prepare for your MRI registry exam with over 2,000 ARRT-style practice questions covering all major topics. Utilize various quiz modes, track your progress, and simulate exam conditions. A premium subscription unlocks the full question bank and advanced features.

**Highlights:** 2,000+ ARRT-style questions, Random Question mode, Custom Quiz mode, Past Errors Quiz, Mock Exam mode, Progress tracking, Exam countdown

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MRI Premium Monthly | $24.99 | per month |
| MRI Premium Annual | $59.99 | per year |


### Spintuition

[App page](https://appshunter.io/ios/app/spintuition/id6813756211)

Explore interactive 3D visualizations of MRI spin dynamics for educational purposes. Control RF pulses, gradients, and spin behavior to deepen understanding of MRI principles. Supports loading and exporting pulseq sequences for compatibility with other tools.

**Highlights:** Interactive 3D MRI spin dynamics, Control RF pulses and gradients, Direct spin dynamics control, Waveform visualization, Pulseq sequence loading/exporting, Guided tours and examples

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

**In-app purchases:** none


## Frequently asked questions

### Is MRI Registry Compass free?

MRI Registry Compass is free to download, with in-app purchases available.

### Is Spintuition free?

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

### Which has better reviews, MRI Registry Compass or Spintuition?

MRI Registry Compass is rated higher. MRI Registry Compass averages 5.0 out of 5 from 3 ratings, while Spintuition averages 4.5 from 2 ratings.

### Do MRI Registry Compass or Spintuition have ads?

Neither MRI Registry Compass nor Spintuition shows ads.

### Which is updated more often, MRI Registry Compass or Spintuition?

MRI Registry Compass ships an update monthly, and Spintuition every 4 days. Most recently, MRI Registry Compass was updated on October 31, 2026 and Spintuition 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.*