# C vs Vxio

The clearest difference is review sentiment: Vxio at 100% against C's 0%. Vxio also leads on price (Free vs $2.99) and rating (4.9 vs 1.0). C's advantage is iOS requirement (13.0 vs 17.0). On ads and in-app purchases there is nothing between them.

Vxio is free to download; C costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Vxio holds the better App Store score, 4.9 against 1.0. That said, the two scores are not equally well evidenced: Vxio has 101 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of C's written reviews are positive against 100% of Vxio's.

C ships an update every 14 months, Vxio every 3 weeks. The most recent releases landed on October 19, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | C | Vxio |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/c-measure/id397314427/reviews) | **[4.9 (101 ratings)](https://appshunter.io/ios/app/vxio/id6475702074/reviews)** |
| Number of ratings | 1 | **101** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 3 weeks** |
| Monetization | Paid | **Free** |
| Size | 4 MB | 4 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple TV, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [alpha prompt co.,ltd.](https://appshunter.io/developer/391698490) | [Chen Zhang](https://appshunter.io/developer/1724279417) |

## What reviewers say

### C

[App page](https://appshunter.io/ios/app/c-measure/id397314427)

This app analyzes photographs to display the color of any point in XYZ and L*a*b* color spaces. It also allows for measuring the distance between two colors within the L*a*b* color space. Calibration options are available for matching camera characteristics and photography environments.

**Highlights:** Color measurement in XYZ and L*a*b*, Distance measurement between colors, Camera characteristic adjustment, Photography environment calibration, Color checker calibration

**Features:** macOS Compatibility

**In-app purchases:** none


### Vxio

[App page](https://appshunter.io/ios/app/vxio/id6475702074)

Stream content from NDI devices directly to your iOS device. This application acts as a monitor for NDI sources, allowing you to view content from devices like HDMI encoders on your iPhone or iPad.

**Highlights:** NDI source monitor, Stream NDI content to iOS, View HDMI encoder streams, Real-time monitoring

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is C free?

C costs $2.99, with no in-app purchases.

### Is Vxio free?

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

### Which has better reviews, C or Vxio?

Vxio is rated higher. C averages 1.0 out of 5 from 1 ratings, while Vxio averages 4.9 from 101 ratings.

### Do C or Vxio have ads?

Neither C nor Vxio shows ads.

### Which is updated more often, C or Vxio?

C ships an update every 14 months, and Vxio every 3 weeks. Most recently, C was updated on October 19, 2026 and Vxio on October 30, 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.*