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Spot Spray Tank Mix Calculator
About the App
Spot Spray Calculator figures tank-mix amounts from label rate (per acre or hectare) or percentage solution, for any size tank. Use it for any product in a spot-spray tank mix—including pesticides—not just one chemical type. Save recipes, sync across iPhone, iPad, and Mac.
Features
- Guided entry — amber border shows active field; gold confirms saved data
- US / SI toggle — switch Imperial or Metric in one tap
- UOM cycle — oz, mL, gal, L, and more to match your label
- Acre Rate or % Rate — works with either label style
- Multi-ingredient recipes — add chemicals to the same tank mix
- Reorder and bulk actions — drag recipes, select all, share/print/delete
- iCloud sync — recipes follow you across iPhone, iPad, and Mac
- Mac "Keep on Top" — float the window across all desktops
- Native iPhone, iPad & Mac — built with SwiftUI for each platform
How to Use
Quick Start
- Tap US or SI to set your unit system.
- Tap UOM to cycle through units of measurement (oz, mL, gal, L…) matching your product label.
- Choose Acre Rate (or HA Rate) or % Rate for your label method.
- Enter your label rate in the top field (amber border shows where you're typing).
- Tap the Tank Size field and enter your tank volume — the label rate field turns gold to confirm your data.
- Tap = to calculate. Save the recipe, add more ingredients to the same tank, or share/print from Spray Recipes.
Spray Recipes
- Tap a recipe card to select it (gold border)
- Drag the grip handle to reorder recipes
- Select All, Share/Print, or Delete in bulk
- Recipes sync across your devices via iCloud
Mac Tips
- Enable "Keep on Top" in Settings to float the window across desktops
Platform
iPhone & iPad (iOS/iPadOS 18.0+) · Mac (macOS 15.0+, native)
Support
For support, questions, or feedback, please use our feedback form:
Feedback: Keene Apps feedback form
Platforms: iPhone, iPad, and Mac
Privacy
No personal data collected. Data stays on your device; recipes may sync via iCloud.
Read our full Privacy Policy
Disclaimer
⚠️ Important Safety Notice
This calculator is provided for informational purposes only. Always follow the manufacturer's label directions precisely. The developer assumes no liability for any damages, crop injury, losses, or adverse outcomes resulting from use of this application. Crop injury or poor results may occur from factors beyond one's control (e.g., weather conditions, improper application, equipment malfunction, or environmental factors). Users assume all risks and responsibilities when using this tool.
Important: Always read agrochemical labels for all warnings and directions before use. This app is a calculation tool only and does not replace professional agricultural advice or product label instructions.
Acceptance: By using Spot Spray Calculator, you accept this disclaimer and all associated risks.
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