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SoilHue

SoilHue

Munsell soil classifier

1 ratings
1 review
📚 Education
🔧 Utilities
Free

Details

  • Released
  • Updated
  • April 25, 2025
  • May 19, 2026

Features

Developer

Antonio J. Gonzalez
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SoilHue screenshot #1 for iPhone
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SoilHue screenshot #6 for iPhone
iphone
ipad
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❓8 answered
FAQ↘︎
📦~ in 6 months
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About

This app analyzes soil color from photographs, providing Munsell notation and an approximate USDA soil order. It offers advanced camera calibration and on-device processing for privacy. Ideal for professionals and students working with soil.

✓Soil color identification from photos
✓Munsell notation and USDA soil order
✓Advanced camera calibration
✓On-device image analysis
✓Export data to .xlsx
✓Lighting condition check
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What's New in SoilHue

2.0

May 19, 2026

SoilHue 2.0 brings a complete rewrite of the color analysis engine: • Far more accurate Munsell classification — comparison now happens in CIE Lab (ΔE94) against 293 reference chips from the official USDA Munsell renotation, replacing the previous 18-entry table. • Camera calibration uses a 3×3 matrix least-squares fit over the 24 ColorChecker patches — captures cross-channel correction the old per-channel factors couldn't. • Automatic ColorChecker detection: the app finds and rectifies the card inside your photo, no need to fill the frame. • Print your own calibration card — share a 2-page A4 PDF with embedded ICC sRGB profile straight from the calibration screen. • Lighting check: a warm/cool/atypical light tint is flagged so you remember to take samples under the same light. • Excel (.xlsx) export now produces a real workbook. • A persistent banner reminds you to calibrate before analyzing. • Accessibility, dark mode and stability improvements throughout. Important: calibrations saved before 2.0 are not compatible with the new engine and are discarded automatically — the app will ask you to recalibrate on first launch. Your saved samples are preserved.

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User reviews

Most RecentHighest RatedLowest Rated

does not work

Error error.generic is the message that is provided by the app each time it is operated on an iPhone 16 Pro. Regardless the calibration, location or area versus polygon options the same error appears every time the application is operated
Empty NowEmpty Now

Response from developer

Hi, First of all, thank you very much for your feedback and for taking the time to report the error. I’m really sorry that your experience with SoilHue wasn’t as expected, and I completely understand your frustration. SoilHue is a personal hobby project I work on in my spare time, and it’s offered for free with no monetization. That said, feedback like yours is incredibly valuable and helps me make the app better for everyone. I believe I’ve identified and fixed the issue you described, and the latest version of the app includes this correction. Thank you again for your honesty. If you decide to give SoilHue another try, I’d be very happy to hear your thoughts or any suggestions you might have. Thanks again for helping improve SoilHue!

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FAQ

What is SoilHue?

SoilHue is a mobile application designed to identify the Munsell color of a soil sample directly from a photograph taken with your device. It provides the Munsell notation and an approximate USDA soil order.

How does SoilHue calibrate the camera?

SoilHue calibrates the camera using an X-Rite ColorChecker Classic. It automatically detects the card in your photo, rectifies its perspective, and computes a correction matrix for accurate color analysis.

Is my soil data private with SoilHue?

Yes, all analysis runs on-device, meaning no image, sample, or location data ever leaves your phone. Samples are stored locally within the app's sandbox.

What devices is SoilHue compatible with?

SoilHue is compatible with iPhones and iPads running iOS 17.6 or later. It requires a reasonably calibrated camera for best results.

Does SoilHue have ads?

No, SoilHue does not contain advertisements. It is a free application with no in-app purchases or ads.

What are the new features in SoilHue 2.0?

Version 2.0 includes 293 reference chips, improved color matching with ΔE94 in CIE Lab, automatic ColorChecker detection, printable calibration cards, lighting checks, and .xlsx export.

How often is SoilHue updated?

The latest version, 2.0, was released on May 19, 2026, indicating active development. Users can expect updates to improve functionality and stability.

What is the user rating for SoilHue?

SoilHue has a rating of 1.0 stars from 1 rating. This indicates a very limited number of user reviews currently available.