Comparison

FieldScout GreenIndex+ vs Scan4Check

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

FieldScout GreenIndex+

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Use the FieldScout GreenIndex+ app to measure the chlorophyll content of your plants and compute nitrogen application recommendations to maximize your production. GreenIndex+ determines the DGCI (Dark Green Color Index) of plant leaves. DGCI is a number between 0 and 1, related to the chlorophyll content. You must use the app with specific green and yellow color standards on a pink target board in order for the DGCI to be computed accurately. It’s as easy as: 1. Using GreenIndex+, take a picture of a leaf lying across the target board. 2. On the screen, tap the green and yellow disks and the leaf to identify the areas to be analyzed. Move and resize the leaf’s circle to analyze the exact portion you want. 3. Read the results: DGCI, and for corn, a SPAD equivalent and nitrogen application recommendations based on university research when using high-Nitrogen reference strips. Results are logged with time stamps and GPS information (if Location Services are enabled), and can be emailed for further analysis with other programs. Averaging combines multiple samples into a single computation, or optionally related readings can be grouped while maintaining the separate data values. Use the White Balance Lock feature to improve accuracy in low or artificial light environments. Requires a rear-camera-equipped iPhone, iPod Touch, or iPad, running iOS 8.0 or later. For DGCI calculations to be accurate, pictures must be taken with the leaves in front of a pink background board with specific green and yellow standard color disks. GreenIndex+ Boards are available from www.SpecMeters.com/GreenIndex.

About

Scan4Check

Features
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Scan4Check is a free, private scanning mobile application created to identify suspicious packaging via a security label on product packaging to fight against risks of falsification. Why should I use Scan4Check? Falsification of products and packaging is everywhere. This innovative solution allows a product to be simply scanned and verified and protects legitimate supply chains from illegal activities. How to verify a product 1. Download the application and enter the new digital packaging protection solution experience. 2. Scan the QR code of the security label. 3. Then the application will automatically scan the security label of your product and provide you with the authentication result in a few seconds. How it works This application is based on a proprietary and secure algorithm that analyzes the product image to generate a highly secure and robust authentication result. Compatibility with smartphones: iOS 15 and higher versions. Do not forget to verify that your smartphone has a functional flash lighting system. Your mobile must be connected to Internet.

Screenshots

FieldScout GreenIndex+4 screens
Scan4Check3 screens

Verdict

The call

The clearest difference is price: Scan4Check at Free against FieldScout GreenIndex+'s $99.99. Scan4Check also leads on update cadence (every 2 months vs every 7 months). FieldScout GreenIndex+'s advantage is iOS requirement (11.0 vs 15.5). 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

CostPrice · In-app purchases · Ads · Monetization

Scan4Check is free to download; FieldScout GreenIndex+ costs $99.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

FieldScout GreenIndex+ ships an update every 7 months, Scan4Check every 2 months. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

Scorecard3 real differences · 3 level
FieldScout GreenIndex+ versus Scan4Check: the parameters behind the verdict, then further details
ParameterFieldScout GreenIndex+Scan4Check
Price$99.99Free — better
Update frequencyEvery 7 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPod
Requires iOS11.0 — better15.5
Further details — not scored
Size5 MB82 MB
Age rating4+4+
DeveloperSpectrum Technologies, Inc.EDGYN

In-app purchases

None

FieldScout GreenIndex+

No in-app purchases

None

Scan4Check

No in-app purchases

Questions

Is FieldScout GreenIndex+ free?
FieldScout GreenIndex+ costs $99.99, with no in-app purchases.
Is Scan4Check free?
Scan4Check is free to download, with no in-app purchases.
Do FieldScout GreenIndex+ or Scan4Check have ads?
Neither FieldScout GreenIndex+ nor Scan4Check shows ads.
Which is updated more often, FieldScout GreenIndex+ or Scan4Check?
FieldScout GreenIndex+ ships an update every 7 months, and Scan4Check every 2 months. Most recently, FieldScout GreenIndex+ was updated on November 1, 2026 and Scan4Check on October 30, 2026.

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