Comparison

FS Yield Estimator vs NPK BlendForm

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

Head to head
About

FS Yield Estimator

Calculate estimated crop yields directly on your iOS device. Input key metrics like ear kernel length and girth, plant population, and kernels per bushel. The app also uses GPS to georeference each estimation for advanced reporting.

Highlights
  • Estimate crop yields
  • Input ear kernel length and girth
  • Calculate plant population
  • Determine kernels per bushel
  • Georeference estimations with GPS
  • Advanced online reporting for FS members
Read full description

The FS Yield Estimator application brings complex yield calculations to your iOS device. With its easy to use interface, you will be calculating your estimated yield in no time capturing ear kernel length and girth, plant population, and kernels per bushel. In addition, using your device's GPS, the FS Yield Estimator can georeference each estimation. FS members can take advantage of advanced reporting and trend analysis tools available online through our web application.

About

NPK BlendForm

This professional tool assists fertilizer dealers and agronomists in creating, pricing, and documenting custom fertilizer blends. It offers flexible calculation modes, supports various nutrient types, and helps manage customer data and blend tickets. Generate professional printable documents for clients and operators.

Highlights
  • Custom fertilizer formulation
  • Flexible calculation modes
  • Nutrient and micronutrient support
  • Cost, price, and margin calculation
  • Customer and blend ticket management
  • Printable blend document generation
  • Data backup and export
Features
Read full description

NPK BlendForm™ is a professional fertilizer formulation, pricing, and blend-document app built for fertilizer dealers, agronomists, retailers, and other agricultural professionals. Create and price fertilizer blends quickly using three flexible calculation modes: • Nutrients per Acre • 2,000-lb Grade • Manual Blend NPK BlendForm helps you: • Build custom fertilizer formulations • Work with N, P₂O₅, K₂O, sulfur, magnesium, calcium, micronutrients, and nutrient forms • Apply chlorine limits and product availability constraints • Include slow-release nitrogen targets • Calculate blend cost, selling price, and gross margin • Save customers and blend tickets • Search saved blends by customer or analysis • Generate professional Printable Blend Documents for customers, office staff, and blend operators • Back up and export your data Your product analyses, costs, customers, fields, and saved blends remain on your device unless you choose to export or share them. NPK BlendForm is designed to help fertilizer professionals work faster while keeping the formulation and pricing process clear and practical. Subscription required for continued use after the introductory period. Eligible new subscribers receive the first month free. U.S. annual subscription price is $299.99; pricing may vary by App Store storefront. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

FS Yield Estimator4 screens
NPK BlendForm3 screens

Verdict

The call

The clearest difference is rating: NPK BlendForm at 5.0 against FS Yield Estimator's 3.0. NPK BlendForm also leads on update cadence (every 5 days vs every 4 months). FS Yield Estimator's advantage is in-app purchases (none vs 1) and ratings volume (5 vs 1). On price, ads 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

Both are free to download. NPK BlendForm sells 1 in-app purchase, starting at $299.99 per year. FS Yield Estimator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

NPK BlendForm holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: FS Yield Estimator has 5 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

FS Yield Estimator ships an update every 4 months, NPK BlendForm every 5 days. The most recent releases landed on October 20, 2026 and October 15, 2026 respectively.

Scorecard6 real differences · 4 level
FS Yield Estimator versus NPK BlendForm: the parameters behind the verdict, then further details
ParameterFS Yield EstimatorNPK BlendForm
PriceFreeFree
Rating3.0 (5 ratings)5.0 (1 ratings) — better
Positive reviews66.7% of reviews—
Number of ratings5 — better1
Update frequencyEvery 4 monthsEvery 5 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterSubscription
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15 — better17.0
Further details — not scored
Size65 MB5 MB
Age rating4+4+
DeveloperGROWMARK, Inc.AgriBlend Technologies LLC

Customer experience

FS Yield Estimator

All ratings5 ratings
Positive40.0%
Neutral20.0%
Negative40.0%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

NPK BlendForm

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

FS Yield Estimator

No in-app purchases

1 purchases

NPK BlendForm

Subscriptions1
  • NPK Blendform Annual1 Month trial$299.991 Year

Questions

Is FS Yield Estimator free?
FS Yield Estimator is free to download, with no in-app purchases.
Is NPK BlendForm free?
NPK BlendForm is free to download, with in-app purchases available.
Which has better reviews, FS Yield Estimator or NPK BlendForm?
NPK BlendForm is rated higher. FS Yield Estimator averages 3.0 out of 5 from 5 ratings, while NPK BlendForm averages 5.0 from 1 ratings.
Do FS Yield Estimator or NPK BlendForm have ads?
Neither FS Yield Estimator nor NPK BlendForm shows ads.
Which is updated more often, FS Yield Estimator or NPK BlendForm?
FS Yield Estimator ships an update every 4 months, and NPK BlendForm every 5 days. Most recently, FS Yield Estimator was updated on October 20, 2026 and NPK BlendForm on October 15, 2026.

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