Ag PhD Field Guide vs Bayer Spray
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ag PhD Field Guide
Identify common weeds and insects in your fields with detailed photos and control recommendations. Access the latest agronomy information and educational content to improve your farming practices.
- Pest identification by name
- Photos of weeds and insects
- Control recommendations
- Agronomy information
- Access to newsletters and university content
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The Ag PhD Field Guide helps you to identify problem pests out in your field. You can browse weeds and insects by name and view photos and read control recommendations. The Ag PhD Field Guide also gives you the most up-to-date agronomy information through the FMC HatchTrak newsletter and the Ag PhD University.
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.
- Field-specific weather forecasts
- Inversion risk assessment
- Erosion/runoff mitigation calculator
- EPA guideline compliance
- Application recordkeeping
- Dicamba recordkeeping support
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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
Verdict
The clearest difference is rating: Bayer Spray at 3.8 against Ag PhD Field Guide's 2.5. Bayer Spray also leads on update cadence (monthly vs every 3 months) and ratings volume (59 vs 8). Ag PhD Field Guide's advantage is review sentiment (50% vs 40%) and iOS requirement (11.0 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Bayer Spray holds the better App Store score, 3.8 against 2.5. That said, the two scores are not equally well evidenced: Bayer Spray has 59 ratings behind it against 8, so its average is the more settled of the two. Written reviews complicate that: 50% of Ag PhD Field Guide's written reviews are positive against 40% of Bayer Spray's, so the app with the better star average is not the one people write more warmly about.
Ag PhD Field Guide ships an update every 3 months, Bayer Spray monthly. The most recent releases landed on November 4, 2026 and November 2, 2026 respectively.
| Parameter | Ag PhD Field Guide | Bayer Spray |
|---|---|---|
| Price | Free | Free |
| Rating | 2.5 (8 ratings) | 3.8 (59 ratings) — better |
| Positive reviews | 50.0% of reviews — better | 40.0% of reviews |
| Number of ratings | 8 | 59 — better |
| Update frequency | Every 3 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 86 MB | 67 MB |
| Age rating | +4 | 4+ |
| Developer | Ag PhD | Bayer Group |
Customer experience
Ag PhD Field Guide
Bayer Spray
In-app purchases
Ag PhD Field Guide
No in-app purchases
Bayer Spray
No in-app purchases
Questions
Is Ag PhD Field Guide free?
Is Bayer Spray free?
Which has better reviews, Ag PhD Field Guide or Bayer Spray?
Do Ag PhD Field Guide or Bayer Spray have ads?
Which is updated more often, Ag PhD Field Guide or Bayer Spray?
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