Privacy Policy
Learn how our height calculator protects your privacy with client-side processing and minimal data collection.
Data Processing Overview
This website utilizes a client-side processing model for all growth and height calculators, meaning personal data entered into calculator fields is processed exclusively within the user's web browser and is never transmitted to, stored on, or accessible by our servers. We only collect information explicitly provided by users through our contact form for the purpose of customer support.
How We Process Calculator Data
Our tools function as secure, browser-based applications that perform mathematical calculations locally on your device.
Step 1: Data Entry
Users input specific metrics such as age, gender, current height, weight, and parental height into the calculator interface.
Step 2: Local Execution
When the "Calculate" button is pressed, JavaScript code running inside your web browser processes these numbers using standard algorithms (such as Khamis-Roche or Tanner stages).
Step 3: Instant Deletion
The data remains in your browser's temporary memory (RAM) only while the page is open. Refreshing the page, closing the tab, or navigating away instantly erases all input data.
Contact Form
We provide a contact form to assist users with support requests.
Contact Form: When you submit an inquiry through our contact form, we receive the name, email address, and message content you provide. This data is processed through Formspree.io, a third-party form handling service, and is transmitted via standard email protocols. The information is used solely to respond to your request.
Data Protection Methodology
We adhere to a Privacy-by-Design framework that minimizes data collection to the absolute minimum required for functionality.
Client-Side Architecture
The core security feature of this website is its architecture. Unlike traditional web applications that send user inputs to a central database for processing, our calculators operate entirely on the "client side" (the user's device).
- No Database Records: We do not maintain a database of child height, weight, or age data.
- No Transmission: Mathematical variables entered in the calculator fields do not cross the network.
- Standard Encryption: All site traffic is served over HTTPS (Hypertext Transfer Protocol Secure), ensuring that the initial load of the webpage and any contact form submissions are encrypted during transit.
Common Misconceptions About Data Storage
Users often assume that entering data into a web form implies permanent storage.
- Input Retention: Inputs are not retained. Once the session ends, the data ceases to exist in our system.
- Anonymity: Because we do not require account creation or login, we cannot link calculator usage to specific individuals or IP addresses.
Data Collection Reference Table
The following table outlines the specific data points encountered on this site and their respective collection status.
| Data Type | Collection Status | Storage Location | Retention Period |
|---|---|---|---|
| Child Age/Gender | Not Collected | User Device (RAM) Only | Session Duration (Instant Deletion) |
| Height/Weight | Not Collected | User Device (RAM) Only | Session Duration (Instant Deletion) |
| Parental Height | Not Collected | User Device (RAM) Only | Session Duration (Instant Deletion) |
| Contact Email | Collected (If voluntarily submitted) | Formspree.io Service | Indefinite (Until support ticket resolves) |
| IP Address | Logged (Standard) | Server Access Logs | Rolling 30-90 Days |
Frequently Asked Questions regarding Privacy
Is the data I enter into the calculator sent to a server?
No. The calculations happen entirely within your web browser using JavaScript. The data never leaves your device and is not saved on our servers.
Do you sell user data to third parties?
No. We do not collect calculator data, so we have no data to sell. Contact information submitted for support is used strictly for communication and is never sold or shared with advertisers.
Can I delete the data I entered?
Action is not required. There is no stored data to delete. Simply closing the browser tab or refreshing the page removes all calculator inputs from your device's memory.
Does this site use cookies?
Yes. We use standard cookies for site functionality and anonymous performance monitoring (e.g., to see which pages are most popular). You can disable cookies in your browser settings, though this may affect non-calculator site features.
Disclaimer and Limitations
This Privacy Policy applies solely to information collected by this website. It does not apply to any third-party websites linked to or from our site. While we utilize secure client-side processing to protect your privacy, no data transmission over the internet is guaranteed to be 100% secure. Users provide contact information at their own risk. The information provided on this website is for educational purposes only and does not constitute professional medical advice.
Privacy Policy Updates
This privacy policy may be updated periodically to reflect changes in our data processing practices or legal requirements.
Last Updated: January 1, 2026