C vs ColorGrail
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.
ColorGrail
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ColorGrail is an innovative application for measuring accurate color spectrum with your smartphone. It can scan surfaces and measure absolute colors with spectrometer grade precision. Print, Paint, Cosmetic, Textile, Industry, Healthcare ..., ColorGrail brings true colors in your hands. An external accessory is required to use the app at its full potential.
Screenshots
Verdict
The clearest difference is price: ColorGrail at Free against C's $2.99. ColorGrail also leads on update cadence (every 2 months vs every 14 months). C's advantage is iOS requirement (13.0 vs 16.0). On ads, in-app purchases and device support 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
ColorGrail is free to download; C costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
C ships an update every 14 months, ColorGrail every 2 months. Both last shipped on September 15, 2026.
| Parameter | C | ColorGrail |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 14 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 13.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 4 MB | 430 MB |
| Age rating | 4+ | 4+ |
| Developer | alpha prompt co.,ltd. | Color Grail Research |
In-app purchases
C
No in-app purchases
ColorGrail
No in-app purchases
Questions
Is C free?
Is ColorGrail free?
Do C or ColorGrail have ads?
Which is updated more often, C or ColorGrail?
Other comparisons
