# Aerial Sprays > Predicts aerial spray droplet sizes using operational parameters for efficient crop protection. (iPhone/iPad app by United States Department of Agriculture, Agricultural Research Service.) - Source: https://appshunter.io/ios/app/aerial-sprays/id475475662 (this page in markdown: same URL + `.md`) - Developer: [United States Department of Agriculture, Agricultural Research Service](https://appshunter.io/developer/475475665) - Category: Reference, Business - Price: Free - Rating: 1.00/5 from 1 App Store ratings · 4 written reviews indexed - Age rating: 4+ - Requires: iOS 8.1 · 18 MB - Languages: American English - Released: 2011-11-01 - Data updated: 2026-06-05 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/aerial-sprays/id475475662/reviews.md ## What is Aerial Sprays? The Aerial Application Technology team is a research group within the United States Department of Agriculture’s (USDA), Agricultural Research Service (ARS). We are responsible for conducting and reporting research that supports the nation’s aerial applicators, who in turn, work with farmers and other producers to protect and supply the nation’s food and fiber crops. To make the most efficacious application to a field or orchard, aerial applicators select specific operational parameters (such as spray nozzle type, spray pressure, airspeed, etc…) that will result in spray droplet sizes that produce maximum on-target deposition of the applied product with minimal off-target movement. The Aerial Application Technology team has developed a series of computer models that easily allow applicators to predict the resulting spray droplet size parameters using their selected operational parameters. There are currently 19 nozzle models available for use (10 for nozzles for fixed-wing aircraft and 9 for nozzles used for helicopters). The fixed-wing models are applicable for airspeed ranges from 100 – 160 mph while the rotary-wing models are applicable for airspeeds from 30 – 100 mph. These models have been available and widely used for a number of years as a series of downloadable spreadsheets. This app adds additional functionality through the increased mobility and a streamlined interface. The spray nozzle models provide applicators with estimates of spray droplet size based on four input parameters that are set by the user. These include: * Nozzle Orifice Size * Nozzle Orientation * Spray Pressure * Airspeed Using the user specified values for these parameters, the models return to following results: * DV0.1, DV0.5, and DV0.9 o Droplet size (in µm) such that 10, 50, or 90% of the spray volume, respectively, is contained in spray droplet sizes of equal or less. * %Vol<100µm and %Vol<200µm o The percentage of spray volume in droplets smaller than 100 or 200 µm, respectively. * Droplet Size Classification o The size classification of the resulting spray based on an engineering standard (ASABE S572 (www.asabe.org). The results, along with the initial parameters, are time and date stamped and can be saved to the user’s device and/or emailed. This app is provided as a public service by the U.S. Dept. of Agriculture-Agricultural Research Service (USDA-ARS). While the information provided is considered public information and may be distributed or copied, it is requested that credit be given to USDA-ARS when using this information. While the Aerial Application Technology team makes every effort to ensure that its databases are error-free, errors do occur. We ask that you notify us immediately of any errors that you discover in our data. We will make every effort to correct them. Reference to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or USDA-ARS. ## Key features - Spray droplet size prediction - 19 nozzle models - Adjustable operational parameters - Droplet size classification - Save and email results - Time and date stamped data ## Recent user reviews (4 of 4) All indexed reviews: https://appshunter.io/ios/app/aerial-sprays/id475475662/reviews.md ### 1/5 — Does not work *2025-06-11* Does not work, no ability to select a nozzle ### 4/5 — Great version 1 *2011-12-09* Excellent! Slick, easy to use, fast,and clean interface. I wish that it displayed Relative Spread and had a section to do nozzle volume flow for setting up an airplane. ### 5/5 — App Review *2011-11-02* This is a very amazing application. I love how easily accessible it is. It is very timely in it's applications. Altogether, it is one of my favorite apps. ### 5/5 — Aerial Spray App Launch *2011-11-01* We hope the aerial application industry finds this app useful and we are looking forward to your comments and suggestions. Even though I am a bit biased, I am going to rate this app 5 stars. Thanks again to the team at Echomobile for their hard work and dedication. ## Frequently asked questions about Aerial Sprays ### What are the key parameters for predicting spray droplet size in Aerial Sprays? Aerial Sprays uses nozzle orifice size, nozzle orientation, spray pressure, and airspeed as input parameters to predict spray droplet sizes. These inputs allow the models to estimate droplet characteristics like DV0.1, DV0.5, DV0.9, and the percentage of spray volume in smaller droplets. ### How many nozzle models are available in Aerial Sprays? Aerial Sprays includes 19 nozzle models. Ten of these are for fixed-wing aircraft, applicable for airspeeds from 100-160 mph, and nine are for helicopters, suitable for airspeeds from 30-100 mph. ### What kind of results does Aerial Sprays provide? The app provides estimates of spray droplet size, including DV0.1, DV0.5, and DV0.9 values, which indicate the droplet size containing a certain percentage of spray volume. It also provides the percentage of spray volume in droplets smaller than 100 or 200 µm, and a droplet size classification based on ASABE S572 standards. ### Can I save or share the results from Aerial Sprays? Yes, the results from Aerial Sprays, along with the initial parameters, are time and date stamped. You can save this data to your device and/or email it for future reference or sharing. ### Is Aerial Sprays available on Android devices? Based on the provided data, Aerial Sprays is available for iPhone, iPad, and iPod. Compatibility with Android devices is not specified. ### How often is Aerial Sprays updated? The latest version of Aerial Sprays is 1.4, which was last updated on September 22, 2016. This indicates that updates may not be very frequent. ### What is the user rating for Aerial Sprays? Aerial Sprays has a rating of 1.0 stars from 1 rating. This suggests limited user feedback is currently available. ### Does Aerial Sprays have ads? No, Aerial Sprays does not contain advertisements. It is provided as a public service by the U.S. Dept. of Agriculture-Agricultural Research Service. ## Version history (last 5 releases) ### 1.4 — 2016-09-22 This app has been updated by Apple to display the Apple Watch app icon. - Stability fix - Update network middleware ### 1.3 — 2014-12-17 - Added ability to remotely update nozzle model database. - Added "solution" filter to allow future data points using active product spray solutions. - "Fixed Wing" models are now under "High Speed", which are model data for airspeeds 120 mph and greater. - "Rotary Wing" models are now under "Low Speed", which are model data for airspeeds less than 120 mph. - Other minor updates and enhancements. ### 1.2 — 2013-12-02 - Formatted for both 3.5inch and 4inch screens - Bug fixes ### 1.1 — 2012-01-27 Bug Fixes ### 1.0 — 2011-11-01 No release notes. ## More apps by United States Department of Agriculture, Agricultural Research Service - [Aerial Nozzle Models](https://appshunter.io/ios/app/aerial-nozzle-models/id6753075329) All apps by United States Department of Agriculture, Agricultural Research Service: https://appshunter.io/developer/475475665 ## Related topics [aerial sprays](https://appshunter.io/ios/topics/aerial-sprays) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-05.*