# VisionMD vs Sigma M

VisionMD and Sigma M are too close to call on the numbers: across 3 compared parameters — price, in-app purchases and iOS requirement among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

## The numbers

| Metric | VisionMD | Sigma M |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/visionmd/id6642713461/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | Every 11 days | — |
| Monetization | Free | — |
| Size | 410 MB | 20 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | **iPhone** | — |
| Age rating | 4+ | 4+ |
| Developer | [UF Health](https://appshunter.io/developer/1157015405) | [Sigma Momentum Inc.](https://appshunter.io/developer/1868574728) |

## What reviewers say

### VisionMD

[App page](https://appshunter.io/ios/app/visionmd/id6642713461)

This app facilitates data collection for research by recording hand and body movements at high frame rates. It utilizes Apple Vision technology to guide users through specific exercises during video capture.

**Highlights:** High frame rate video recording, Hand and body movement capture, Apple Vision guidance, Research data collection support, UF IRB protocol compliance

**In-app purchases:** none


### Sigma M

[App page](https://appshunter.io/ios/app/sigma-m/id6757730417)

**In-app purchases:** none


## Frequently asked questions

### Is VisionMD free?

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

### Is Sigma M free?

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

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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.*