# C vs GenR8

The clearest difference is review sentiment: GenR8 at 100% against C's 0%. GenR8 also leads on rating (4.9 vs 1.0) and update cadence (every 10 days vs every 14 months). C's advantage is price ($2.99 vs $19.99) and iOS requirement (13.0 vs 17.0). On ads, in-app purchases, monetization model and device support there is nothing between them.

C costs $2.99 and GenR8 $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

GenR8 holds the better App Store score, 4.9 against 1.0. That said, the two scores are not equally well evidenced: GenR8 has 9 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 GenR8's.

C ships an update every 14 months, GenR8 every 10 days. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | C | GenR8 |
| --- | --- | --- |
| Price | **$2.99** | $19.99 |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/c-measure/id397314427/reviews) | **[4.9 (9 ratings)](https://appshunter.io/ios/app/genr8/id6751822886/reviews)** |
| Number of ratings | 1 | **9** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 10 days** |
| Monetization | Paid | Paid |
| Size | 4 MB | 21 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [alpha prompt co.,ltd.](https://appshunter.io/developer/391698490) | [Christopher Van Hoose](https://appshunter.io/developer/1510007987) |

## 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


### GenR8

[App page](https://appshunter.io/ios/app/genr8/id6751822886)

Generate professional test patterns for display calibration and validation. Supports external displays via HDMI, DisplayPort, or AirPlay, with HDR pattern support and precision controls for accurate results. Export patterns in various formats.

**Highlights:** 28+ Professional Test Patterns, External Display Support (HDMI, DisplayPort, AirPlay), HDR Pattern Support, Audio Test Tones & Live Metering, Precision Controls & Customizable Overlays, Export Test Patterns

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

**In-app purchases:** none


## Frequently asked questions

### Is C free?

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

### Is GenR8 free?

GenR8 costs $19.99, with no in-app purchases.

### Which has better reviews, C or GenR8?

GenR8 is rated higher. C averages 1.0 out of 5 from 1 ratings, while GenR8 averages 4.9 from 9 ratings.

### Do C or GenR8 have ads?

Neither C nor GenR8 shows ads.

### Which is updated more often, C or GenR8?

C ships an update every 14 months, and GenR8 every 10 days. Most recently, C was updated on November 1, 2026 and GenR8 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.*