C vs Vxio
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
C
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.
- Color measurement in XYZ and L*a*b*
- Distance measurement between colors
- Camera characteristic adjustment
- Photography environment calibration
- Color checker calibration
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C-MEASURE is application to measure a simple color. It display the color of an arbitrary place of the photograph in XYZ, L*a*b*. In addition, It can measure distance on the L*a*b* color space of two colors. The conversion parameter to the chromaticity value performs the adjustment that It matched with the characteristic of the camera of iPhone4 from photograph data, but the calibration that It accept photography environment, and used the color checkers is possible.
Vxio
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.
- NDI source monitor
- Stream NDI content to iOS
- View HDMI encoder streams
- Real-time monitoring
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Vxio is a NDI® source monitor. You can use the app to stream content from other NDI devices (like HDMI encoder) to iOS. NDI® is a registered trademark of Vizrt NDI AB. Vxio is not affiliated with, endorsed, or sponsored by Vizrt NDI AB.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | C | Vxio |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 1.0 (1 ratings) | 4.9 (101 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 | 101 — better |
| Update frequency | Every 14 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPod | iPhone, iPad, Apple TV, Vision Pro — better |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 4 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | alpha prompt co.,ltd. | Chen Zhang |
Customer experience
C
Vxio
In-app purchases
C
No in-app purchases
Vxio
No in-app purchases
