Spectro by Variable 4+

Precise Color Measurement

Variable Technologies LLC

Designed for iPad

    • 4.8 • 87 Ratings
    • Free
    • Offers In-App Purchases



Now Available: Spectro by Variable + Pantone® Color Subscription by Variable.
Users are now able to access more than 16,500 Pantone colors directly through the Spectro by Variable app when they subscribe to a Pantone Color Subscription within.

Created with frictionless color communication in mind, the Spectro by Variable app connects to the Spectro 1 and Spectro 1 Pro devices, allowing color professionals to achieve professional-grade color matches and view deep color data anytime, anywhere.

About the Spectro 1 and Spectro 1 Pro Devices:

Spectro 1 is a compact, affordable color measurement tool for accurately measuring and communicating color at the professional and industrial level.
Using patented technology, the Spectro units are true spectrophotometers that deliver accuracy and repeatability comparable to expensive benchtop spectrophotometers—for a fraction of the price.


Scan, match, and compare colors
View spectral curves for scanned colors
Achieve exact matches with spectral curve and LAB values
Have access to dozens of brands like Behr, Benjamin Moore, Dulux, PPG, Sherwin-Williams in the palm of your hand
View matches under four different light sources including A, F2, D50, and D65 (Incandescent, fluorescent, horizon, and noon daylight)
Include 2 & 10 degree observations
Store scans and scan data
Export scan history, inspection history, and saved colors
Save and export spectral curve data in 10 nm increments between 400-700 nm
Create and store standards through the Saved Colors features
Supports multiple dE formulas

And much more!

What’s New

Version 11.10.3

This release adds support for our newest Spectro devices.

Ratings and Reviews

4.8 out of 5
87 Ratings

87 Ratings

The Inspectah Deck ,


I received my Spectro early - unbelievable for the price. App is very well done.

Gradenko ,

Crash happy, needs landscape on iPad

Every time I tap a color chit to view details on the paint color, the app crashes for both iPhone and iPad. The iPad app needs to be landscape aware.

lancepLowen ,

iPhone app - great, with one caveat. iPad app - meh.

Update 8-23-22:
App worked this morning but this afternoon informed me of a required 30mb download. After downloading, the app just crashes on launch.

The same required download was done on my samsung galaxy s22 ultra and the app runs with no issues there.

I don’t know what the deal is, since the update history on the appstore page gasnt been updated in almost a year.

It’s definitely broken for now.

The app is for all intents and purposes identical on iPad and iPhone. It works very well, but some effort to adapt the iPad app to landscape would be greatly appreciated. It’d be a 5 star rating with a proper IPad landscape mode and addition/correction of the issues noted below. The main caveat - lab plot scaling: The Lab plot when comparing colors is scaled weird. It doesn’t show the whole lab plot, but instead a ‘scaled down to best fit in viewing area’ sort of version. As most color-familiar people already know: L channel range is 0 to 100 a channel range is 128 to -128 b channel range is 128 to -128 some sources use 127 to -128 for a and b channels, i.e., adobe photoshop & Wikipedia I believe this is down to computational reasons rather than the mathematical model. Often the scaled extent of the lab plot display will exceed these values, especially the L channel: For instance, scanning the included white calibration tile as the “standard” (vs any other color) results in the top end of the L channel display being well above 100; in my testing it scales the display up to 158 at the top end. Seems like it’d be better to just show a standard lab plot and place the scanned standard and sample on the plot, rather than scaling the plot to some sort of “best fit”, or at least give the user a little radio button/check box to switch from scaled to non-scaled view.

App Privacy

The developer, Variable Technologies LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Linked to You

The following data may be collected and linked to your identity:

  • Contact Info
  • User Content
  • Identifiers
  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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