Comparison

NozzleCalc vs GrazeOK

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

Head to head
About

NozzleCalc

Quickly calculate sprayer settings for specific nozzles on the go. Determine optimum droplet size and PSI for your applications. Includes a reference section and direct contact to support.

Highlights
  • Sprayer setting calculations
  • Droplet size determination
  • PSI calculation
  • Customizable application rate, speed, and spacing
  • Reference section
  • Direct contact to support
Features
Read full description

Now you can quickly calculate sprayer settings for TurboDrop and AirMix nozzles anywhere with the official Greenleaf Technologies Nozzle Calculator app. Determine optimum droplet size and PSI for all your applications on-the-go and spray with confidence. If you use Greenleaf Technologies spray nozzles for your applications this is the app you shouldn't be without! This is the simplest and most accurate nozzle calculator app for Greenleaf nozzles. See the droplet size each nozzle size generates at a variety of precise pressures. Customize by setting your application rate (gal/ac), speed (mph), spacing (inches), and flowrate (gal/min). The reference section provides additional product info and industry terminology. Speak directly to a knowledgeable Greenleaf Technologies representative with a touch with the autodial contact feature.

About

GrazeOK

Features
Read full description

Managing livestock demands accurate and fast decisions for a successful operation. Nowadays, managers rely on either inaccurate visual inferences or expensive tools for acquiring fast answers to in-farm issues. GrazeOK is a user friendly electronic version of the Oklahoman grazing stick which allows fast and proper estimation of stock density, number of pastures, grazing and rest days by simply measuring plant height and canopy cover with a yard stick and inputting them in your phone. How it works: 1. Download GrazeOK, 2. With a yard stick, measure forage height and canopy cover (optional), 3. Input your operation details: forage species, livestock, grazing system (continuous, rotational, etc), 4. Get proper stock density, number of pastures, grazing and rest days for your operation. The results will be displayed in the screen of your phone and emailed to you (optional).

Screenshots

NozzleCalc4 screens
GrazeOK3 screens

Verdict

The call

The clearest difference is update cadence: GrazeOK at every 2 months against NozzleCalc's every 49 months. GrazeOK also leads on iOS requirement (9.0 vs 11.0). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

NozzleCalc ships an update every 49 months, GrazeOK every 2 months. The most recent releases landed on October 10, 2026 and October 16, 2026 respectively.

Scorecard2 real differences · 7 level
NozzleCalc versus GrazeOK: the parameters behind the verdict, then further details
ParameterNozzleCalcGrazeOK
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 49 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.09.0 — better
Further details — not scored
Size13 MB23 MB
Age rating4+4+
DeveloperGreenleaf TechnologiesOklahoma State University

In-app purchases

None

NozzleCalc

No in-app purchases

None

GrazeOK

No in-app purchases

Questions

Is NozzleCalc free?
NozzleCalc is free to download, with no in-app purchases.
Is GrazeOK free?
GrazeOK is free to download, with no in-app purchases.
Do NozzleCalc or GrazeOK have ads?
Neither NozzleCalc nor GrazeOK shows ads.
Which is updated more often, NozzleCalc or GrazeOK?
NozzleCalc ships an update every 49 months, and GrazeOK every 2 months. Most recently, NozzleCalc was updated on October 10, 2026 and GrazeOK on October 16, 2026.

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