Comparison

Corn Diseases vs Bayer Spray

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

Head to head
About

Corn Diseases

This app offers a comprehensive guide to common corn diseases found in the US and Canada. It focuses on practical, in-field diagnosis to help users identify and understand various crop ailments.

Highlights
  • Overview of US and Canada corn diseases
  • Emphasis on field diagnosis
  • Practical identification tools
  • Crop ailment information
Features
Read full description

Provides an overview of the corn diseases that occur in the US and Canada, with an emphasis on diagnosing diseases in the field.

About

Bayer Spray

This app assists farmers in planning agricultural spray applications. It provides field-specific weather forecasts, calculates erosion and runoff mitigation points based on EPA guidelines, and helps with mandatory recordkeeping for pesticide applications.

Highlights
  • Field-specific weather forecasts
  • Inversion risk assessment
  • Erosion/runoff mitigation calculator
  • EPA guideline compliance
  • Application recordkeeping
  • Dicamba recordkeeping support
Features
Read full description

The Bayer Spray app helps farmers effectively plan agricultural spray applications for their fields. Download the app. Start your spray planning today. Calculate erosion/runoff mitigation points based on EPA guidelines. Get field-specific weather forecasts — including temperature and inversion risk. Enable the creation and retention of application records. Forecast Section - Helps you identify weather conditions and inversion risk prior to spray applications. • Hourly, location-specific forecast of temperature, relative humidity, wind speed (adjusted to 6 feet) and direction, and inversion risk. • Specific field location inversion-risk forecast. • The weather forecasts leverage publicly available weather data and models from the National Oceanic and Atmospheric Administration (NOAA) and unique models from Bayer Crop Science’s weather scientists to forecast weather conditions — including the likelihood of an inversion — that help growers and applicators planning to spray a pesticide. Fields Section (Formerly Location) - Allows for application planning at the field level. • The list of saved fields provides information on any mitigation points calculated, as well as certain application risks for upcoming planned applications. • NEW alerts help applicators understand how to plan for compliant sprays on their unique fields. Compliance Section - A new addition to the app that provides a runoff/erosion mitigation calculator to help farmers and applicators plan applications. • The calculator keeps a running total of mitigation points (by field) accumulated as the form is completed. • Calculations can be completed for multiple fields at a time. • Save, edit, and share field-specific calculations to track compliance. SprayLog Section (Formerly Record) - Helps applicators with mandatory dicamba recordkeeping requirements. • Elements required by the federal OTT dicamba product label are included to enable greater ease of use. • Applicators can save and export field records. • The information you enter in the application records is stored on your mobile device. Information provided by the Bayer Spray app is for planning purposes only, and is not a substitute for reading and following all pesticide label directions. It is the applicator's responsibility to comply with all laws relevant to the applicator's farming operation, including pesticide label compliance.

Screenshots

Corn Diseases4 screens
Bayer Spray4 screens

Verdict

The call

The clearest difference is update cadence: Bayer Spray at monthly against Corn Diseases's every 15 months. Bayer Spray also leads on ratings volume (59 vs 1). Corn Diseases's advantage is rating (4.0 vs 3.8) and iOS requirement (8.1 vs 16.0). On price, ads, in-app purchases and monetization model 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.

ReceptionRating · Positive reviews · Number of ratings

Corn Diseases holds the better App Store score, 4.0 against 3.8. That said, the two scores are not equally well evidenced: Bayer Spray has 59 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Corn Diseases ships an update every 15 months, Bayer Spray monthly. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.

Scorecard4 real differences · 6 level
Corn Diseases versus Bayer Spray: the parameters behind the verdict, then further details
ParameterCorn DiseasesBayer Spray
PriceFreeFree
Rating4.0 (1 ratings) — better3.8 (59 ratings)
Positive reviews—40.0% of reviews
Number of ratings159 — better
Update frequencyEvery 15 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS8.1 — better16.0
Further details — not scored
Size16 MB67 MB
Age rating4+4+
DeveloperAg PhDBayer Group

Customer experience

Corn Diseases

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

Bayer Spray

All ratings59 ratings
Positive69.5%
Neutral1.7%
Negative28.8%
Written reviews20 reviews
Positive40.0%
Neutral0.0%
Negative60.0%

In-app purchases

None

Corn Diseases

No in-app purchases

None

Bayer Spray

No in-app purchases

Questions

Is Corn Diseases free?
Corn Diseases is free to download, with no in-app purchases.
Is Bayer Spray free?
Bayer Spray is free to download, with no in-app purchases.
Which has better reviews, Corn Diseases or Bayer Spray?
Corn Diseases is rated higher. Corn Diseases averages 4.0 out of 5 from 1 ratings, while Bayer Spray averages 3.8 from 59 ratings.
Do Corn Diseases or Bayer Spray have ads?
Neither Corn Diseases nor Bayer Spray shows ads.
Which is updated more often, Corn Diseases or Bayer Spray?
Corn Diseases ships an update every 15 months, and Bayer Spray monthly. Most recently, Corn Diseases was updated on October 24, 2026 and Bayer Spray on October 22, 2026.

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