# ACVR vs Spintuition

ACVR and Spintuition both sit at 4.7 stars, but that hides the real split: 100% of Spintuition's written reviews are positive against 0% of ACVR's. Spintuition also leads on update cadence (every 4 days vs every 12 months). ACVR's advantage is ratings volume (29 vs 2) and iOS requirement (15.5 vs 17.0). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ACVR holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: ACVR has 29 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 0% of ACVR's written reviews are positive against 100% of Spintuition's, so the app with the better star average is not the one people write more warmly about.

ACVR ships an update every 12 months, Spintuition every 4 days. The most recent releases landed on October 21, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | ACVR | Spintuition |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (29 ratings)](https://appshunter.io/ios/app/acvr/id1436889250/reviews)** | [4.5 (2 ratings)](https://appshunter.io/ios/app/spintuition/id6813756211/reviews) |
| Number of ratings | **29** | 2 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 4 days** |
| Monetization | Free | Free |
| Size | 83 MB | 5 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [ACVR](https://appshunter.io/developer/1436889249) | [BRIAN ANDREW HARGREAVES](https://appshunter.io/developer/6813756693) |

## What reviewers say

### ACVR

[App page](https://appshunter.io/ios/app/acvr/id1436889250)

Access conference schedules, presentations, and exhibitor details. Take notes directly on slides, draw on content, and utilize in-app messaging for networking. Share information easily with colleagues and attendees.

**Highlights:** View conference schedule, Access presentations and speaker details, Take notes on slides, Draw directly on presentation slides, In-app messaging for attendees, Share information via tweet and email

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

**In-app purchases:** none


### Spintuition

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

Explore interactive 3D visualizations of MRI spin dynamics for educational purposes. Control RF/gradients and spin behavior, view waveforms, and load pulseq sequences. Ideal for learning and teaching MRI principles.

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

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

**In-app purchases:** none


## Frequently asked questions

### Is ACVR free?

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

### Is Spintuition free?

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

### Which has better reviews, ACVR or Spintuition?

ACVR is rated higher. ACVR averages 4.7 out of 5 from 29 ratings, while Spintuition averages 4.5 from 2 ratings.

### Do ACVR or Spintuition have ads?

Neither ACVR nor Spintuition shows ads.

### Which is updated more often, ACVR or Spintuition?

ACVR ships an update every 12 months, and Spintuition every 4 days. Most recently, ACVR was updated on October 21, 2026 and Spintuition on October 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.*