Privacy Policy
Effective Date: July 30, 2026 · Applies to: DiluCalc for iOS (all versions)
The short version
01 Overview
DiluCalc ("the app," "we," "our") is a dilution ratio, rate conversion, and mixing calculator, published by an independent developer. This Privacy Policy describes how DiluCalc handles information when you use the app.
DiluCalc does not collect, transmit, sell, or share any data with us or with anyone else. The app has no server component, no account system, and no persistent storage. It performs every calculation locally, in memory, for as long as the app is open.
02 Information We Collect
We collect nothing. There is no backend server for DiluCalc to send data to. Specifically, DiluCalc does not collect:
- Your name, email address, or any contact information
- Any figures you enter into a calculator (ratios, volumes, weights, application rates, or any other numbers)
- Device identifiers, advertising identifiers, or IP addresses
- Location data
- Usage analytics, screen views, or interaction logs
- Crash reports or diagnostic logs sent to a remote server
Numbers you type into any calculator exist only in the app's memory while you're using it. They're used solely to compute the on-screen result and disappear the moment you close the app or switch tabs — nothing is written to disk.
03 Nothing Is Stored, Even Locally
Unlike apps that save favorites, history, or preferences, DiluCalc keeps no persistent storage at all — no local database, no saved calculations, no settings file. Every time you open the app, it starts fresh. This is a deliberate design choice: it keeps the app simple, fast, and impossible to leak data from, because there's no data sitting on the device to leak in the first place.
04 No Analytics, Advertising, or Tracking
DiluCalc does not integrate any analytics SDK, advertising network, or tracking framework. We have no way of knowing how many people use the app, which tools are opened, or any other usage metric, because no such data is ever generated or transmitted for us to see.
DiluCalc displays no advertisements and will never sell or rent any data to advertisers, because there is no data to sell in the first place.
05 Third-Party Services
DiluCalc does not embed any third-party software development kits (SDKs), libraries that phone home, or external services of any kind. It makes no network requests whatsoever.
06 Children's Privacy
DiluCalc is a general-purpose calculation tool suitable for all ages. We do not knowingly collect information from anyone, including children, because we do not collect information from any user at all.
07 Changes to This Policy
If DiluCalc's data practices ever change, this policy will be updated first, with a new effective date, before that change ships. Given the app's fully offline, no-storage design, we don't expect this to happen often.
Questions about this policy?
If anything here is unclear, reach out directly — a real person (the developer) reads and responds to every message.
prowitinw2@gmail.comHelp & Support
Getting Started
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Pick the tool you need from the tab bar
DiluCalc has five calculators, each in its own tab: Dilution Ratio, Rate Converter, Tank Mix, Area & Rate, and PPM/%/EC. Jump straight to whichever one matches your task.
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Enter your numbers
Every field updates the result live as you type — there's no separate "Calculate" button to press.
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Switch units where needed
Most fields have a unit picker next to them (mL/L/gal, ไร่/hectare/acre, etc.) — change it and the calculation adjusts automatically.
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Chain tools together for bigger jobs
For example, use Area & Rate to find the total spray volume needed for a field, then take that number into Tank Mix to work out exactly how much product to add.
The Tools
Frequently Asked Questions
What is DiluCalc for?
DiluCalc is a general-purpose dilution ratio and concentration-based rate calculator. It's built for lab work, hydroponics, agriculture, cleaning and detailing solutions, and any task that involves mixing a concentrate with a diluent or metering a solution's delivery rate.
Does DiluCalc work without an internet connection?
Yes, fully and always. DiluCalc makes no network requests at all — every calculation happens entirely on your device.
Is my data private?
Yes — more than private, it's never stored at all. DiluCalc doesn't save anything between sessions, collects no data, and has no account system. See the Privacy Policy section above for details.
Why doesn't the app save my previous calculations?
This is intentional. DiluCalc has no persistent storage by design, which keeps it simple and means there's never any data on your device to worry about protecting.
What does the EC-to-ppm conversion scale mean?
EC (electrical conductivity) meters are calibrated to different ppm standards depending on the brand — commonly a "500 scale" (US/Hanna-style) or a "700 scale" (AU/EU-style). Check your meter's manual to see which one it uses, then pick the matching option in the PPM/%/EC tool.
Is a ไร่ (rai) the same everywhere?
Rai is a standard Thai unit of land area (1 ไร่ = 1,600 m² = 0.16 hectare = 0.395 acre), included because it's commonly used in Thai agriculture. The Area & Rate tool also supports hectare and acre for international use.
I think a conversion or formula is wrong. How do I report it?
Please email prowitinw2@gmail.com with the tool name and what you believe is incorrect. Accuracy reports are looked at promptly.
Does DiluCalc cost anything or show ads?
DiluCalc shows no advertisements. Refer to the App Store listing for current pricing information.
Reminder: DiluCalc performs generic mathematical conversions only. It does not provide guidance specific to any product, substance, or field of use — always verify that your figures and results are appropriate for your task before use.
Still need help?
Whether it's a bug, a conversion question, a feature request, or anything else — send it over. A real person reads every message.
prowitinw2@gmail.comTypical response time: 1–3 business days