Hooloovoo vs ColorGrail
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Hooloovoo
This utility app converts colors between various formats like RGB, CMYK, and XYZ. It can identify the closest CSS or Crayola color, import custom palettes, and even capture colors using your device's camera. It's a comprehensive tool for all your color conversion needs.
- Multiple color format conversion (RGB, CMYK, XYZ, etc.)
- Find closest CSS/Crayola colors
- Import custom color palettes
- Capture colors with device camera
- Supports iOS 7 and newer devices
Read full descriptionHide full description
Have you ever needed to convert a colour from one format to another? If you have, Hooloovoo is the utility that you’ve been waiting for. With Hooloovoo you can convert to and from RGB, CMYK, XYZ, Yxy, CIE Lab, Hunter and many more besides. You can find out what the closest CSS or Crayola colour is and import your own palettes. As if that wasn’t enough, Hooloovoo can even capture a colour using the built in camera. Hooloovoo is your one-stop swiss army knife for all your colour needs. If you have a specialist colour conversion requirement that Hooloovoo doesn’t yet support, please get in touch and it will be our pleasure to update Hooloovoo accordingly. Hooloovoo has been tested on iOS 7 devices and newer from the original iPhone 4, through to the very latest iPhone 7s. If your iOS device can run iOS 7 or newer then you can run Hooloovoo on it.
ColorGrail
Read full descriptionHide full description
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 update cadence: ColorGrail at every 2 months against Hooloovoo's every 31 months. On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Hooloovoo ships an update every 31 months, ColorGrail every 2 months. The most recent releases landed on October 25, 2026 and October 19, 2026 respectively.
| Parameter | Hooloovoo | ColorGrail |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 31 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 17.6 | 16.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 430 MB |
| Age rating | 4+ | 4+ |
| Developer | Pascal Harris | Color Grail Research |
In-app purchases
Hooloovoo
No in-app purchases
ColorGrail
No in-app purchases
Questions
Is Hooloovoo free?
Is ColorGrail free?
Do Hooloovoo or ColorGrail have ads?
Which is updated more often, Hooloovoo or ColorGrail?
Other comparisons
