Comparison

NozzleCalc vs ChemLog

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

ChemLog

This app helps farmers and pesticide applicators create compliant, professional spray records digitally. It logs application details, weather data, field information, equipment, and pilot profiles, generating one-tap PDF reports and exporting data to CSV.

Highlights
  • Log chemical applications with weather data
  • Define and map fields with automatic acreage calculation
  • Track equipment and pilot details
  • Import chemical labels via barcode or photo
  • Generate one-tap PDF compliance reports
  • Share records with crew via AirDrop/Messages
  • Export data to CSV
Features
Read full description

ChemLog requires a ChemLog Pro subscription to access all features. A 7-day free trial is included automatically — no payment required to get started. Subscriptions are billed monthly or annually and can be cancelled at any time in your Apple ID settings. ChemLog is the spray record-keeping app built for farmers and licensed pesticide applicators who want compliant, professional records without the paperwork. LOG EVERY APPLICATION: Record chemicals, application rates, total volume, and area covered for each spray session. Weather data — wind speed, direction, temperature, and humidity — is captured at the time of logging so your records are always accurate. KNOW YOUR FIELDS: Add your fields once and link them to every session. Mark polygon boundaries on satellite imagery by tapping points around your field perimeter — ChemLog automatically calculates acreage so you don't have to measure it yourself. TRACK YOUR EQUIPMENT: Log which drone or sprayer you used for each application. Store FAA registration numbers, serial numbers, and equipment details in one place. MANAGE YOUR PILOTS: Store pilot profiles with their FAA Part 137 certificate, business insurance, FAA drone registration, and state applicators license — all in one place. Assign pilots to spray sessions and include them automatically in your PDF reports. IMPORT CHEMICAL LABELS: Scan the barcode on a pesticide container to pre-fill the EPA registration number instantly. Or import a photo or PDF of the label and let ChemLog read the product name, manufacturer, active ingredients, and EPA numbers automatically. ONE-TAP PDF REPORTS: Generate a complete, compliance-ready application record for any session in one tap. Professional PDF reports include all application details, weather conditions, field information, chemical data, and pilot information — ready to share with your agronomist, co-op, or for your own records. SHARE WITH YOUR CREW: Share chemical and drone records instantly with co-workers via AirDrop or Messages. One tap exports the record as a file — they open it and it imports directly into their ChemLog. EXPORT TO CSV: Export all your spray records as a CSV file for use in Excel, Google Sheets, or any record-keeping system your operation requires. ICLOUD SYNC: Your data stays in sync across all your Apple devices automatically via iCloud. Records logged in the field on your iPhone are waiting for you on your iPad back at the office. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

NozzleCalc4 screens
ChemLog4 screens

Verdict

The call

The clearest difference is in-app purchases: NozzleCalc at none against ChemLog's 2. NozzleCalc also leads on iOS requirement (11.0 vs 17.0). ChemLog's advantage is update cadence (every 2 months vs every 49 months). On price, rating, ratings volume and ads 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. ChemLog sells 2 in-app purchases, starting at $9.99 per month. NozzleCalc asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for NozzleCalc against 5.0 for ChemLog. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

NozzleCalc ships an update every 49 months, ChemLog every 2 months. The most recent releases landed on September 23, 2026 and October 1, 2026 respectively.

Scorecard4 real differences · 5 level
NozzleCalc versus ChemLog: the parameters behind the verdict, then further details
ParameterNozzleCalcChemLog
PriceFreeFree
Rating5.0 (1 ratings)5.0 (1 ratings)
Number of ratings11
Update frequencyEvery 49 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterSubscription
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS11.0 — better17.0
Further details — not scored
Size13 MB3 MB
Age rating4+4+
DeveloperGreenleaf TechnologiesKyler Scheer

Customer experience

NozzleCalc

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

ChemLog

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

In-app purchases

None

NozzleCalc

No in-app purchases

2 purchases

ChemLog

Subscriptions2
  • ChemLog Monthly7 Days trial$9.991 Month
  • ChemLog Annual7 Days trial$99.991 Year

Questions

Is NozzleCalc free?
NozzleCalc is free to download, with no in-app purchases.
Is ChemLog free?
ChemLog is free to download, with in-app purchases available.
Which has better reviews, NozzleCalc or ChemLog?
NozzleCalc and ChemLog are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do NozzleCalc or ChemLog have ads?
Neither NozzleCalc nor ChemLog shows ads.
Which is updated more often, NozzleCalc or ChemLog?
NozzleCalc ships an update every 49 months, and ChemLog every 2 months. Most recently, NozzleCalc was updated on September 23, 2026 and ChemLog on October 1, 2026.

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