Ground Spray vs AgOtter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ground Spray
This utility app helps custom applicators and growers predict spray quality and droplet size spectrum before application. It uses research data to calculate spray characteristics based on user-inputted parameters like nozzle type and pressure, aiding in pesticide efficacy and drift mitigation.
- Predict spray quality
- Calculate droplet size spectrum
- Input nozzle type, angle, orifice size, pressure
- Save and email results
- Mitigate pesticide drift
- Access up-to-date spray quality information
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The Pesticide Application Technology group at the University of Nebraska-Lincoln ‘s West Central Research and Extension Center (WCREC) in North Platte, NE, is dedicated to investigating aspects of pesticide applications, with emphasis on efficacy and drift. We are utilizing new technologies, including laser diffraction systems in a static chamber, a low-speed wind tunnel and a high-speed wind tunnel, to explore application methods and technologies, such as nozzle selection, adjuvant chemistry, sprayer set up, and wind speed. Our goal is to understand how these factors and others interact to influence spray quality, pesticide efficacy, and drift. We have formed close partnerships with both industry and academic collaborators, including Wilbur-Ellis Co., The Aerial Application Technology team within the USDA-ARS, and the University of Queensland, Australia. It is our mission to work with these groups and others interested in maximizing pesticide efficacy and mitigating pesticide drift. We feel that these research efforts are critical to ensuring that yield loss due to pests does not jeopardize our ability to create food, fiber and fuel for a growing world population as well as ensure the health and sustainability of humankind and our environment. This application will allow custom applicators and growers the ability to easily predict the spray quality of their application before it is applied. The user can input nozzle type, spray angle, orifice size, spray pressure, and solution and the application will calculate the spray quality based on our research. The user will be able to save these results or e-mail them to another person or company. This application will also give the droplet size spectrum for the various input parameters which will allow the applicator to have a sense of the potential of the spray to drift. As our research program moves forward, more data points will be added such that any ground applicator can have access to the most up to date information on spray quality.
AgOtter
This utility app enhances orchard management by providing precise positioning and flow control, even under dense canopies where GPS signals are weak. It wirelessly connects to a mobile device, allowing users to monitor flow rates and adjust settings like swath width and target rate.
- Augments GPS under orchard canopies
- Monitors flow rates and position
- Wirelessly connects to mobile devices
- Adjustable swath width and target rate
- Simulates GPS speed for shop testing
- On-screen speed and rate limit warnings
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AgOtter is positioning and flow control for under your orchards. AgOtter is a flow control device that uses additional sensors to augment GPS when under orchard canopies. Now you can see your flow rates and your position in the field when GPS is blocked by the trees. Wirelessly connected to the mobile device, the AgOtter works with a simple install and can be monitored at anytime using the AgOtter app. Swath Width, Target Rate, Meter Cals and Antenna Offset can be changed from the app. Simulate GPS speed when testing flow at the shop before heading out to the field. Also, get yellow or red warnings on screen when the speed or rate is out of limit.
Screenshots
Verdict
The clearest difference is update cadence: AgOtter at every 2 months against Ground Spray's every 12 months. AgOtter also leads on ratings volume (6 vs 1). Ground Spray's advantage is iOS requirement (9.3 vs 14.4). On price, rating, review sentiment 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Ground Spray holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: AgOtter has 6 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.
Ground Spray ships an update every 12 months, AgOtter every 2 months. The most recent releases landed on October 5, 2026 and October 3, 2026 respectively.
| Parameter | Ground Spray | AgOtter |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.8 (6 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 1 | 6 — better |
| Update frequency | Every 12 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 9.3 — better | 14.4 |
| Further details — not scored | ||
| Size | 10 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | University of Nebraska - Lincoln | Insero |
Customer experience
Ground Spray
AgOtter
In-app purchases
Ground Spray
No in-app purchases
AgOtter
No in-app purchases









