Privacy Policy
Your privacy is important to us. This policy explains how we collect, use, and protect your information.
Last updated: 9/17/2025
Overview
Standard Deviation Calculator ("we," "our," or "us") is committed to protecting your privacy. This Privacy Policy explains how we handle information when you use our website and calculator tools at standarddeviationcalculator.app (the "Service").
Key Privacy Principles:
- • We don't store your calculation data
- • All calculations happen in your browser
- • We collect minimal information necessary for service operation
- • Your data is never sold to third parties
Information We Collect
Calculator Data
What we DON'T collect: Any numbers, datasets, or calculation results you enter into our calculator tools.
How it works: All calculations are performed locally in your web browser using JavaScript. Your data never leaves your device or gets transmitted to our servers.
Website Usage Information
We automatically collect certain information when you visit our website:
- • IP address (for security and analytics)
- • Browser type and version
- • Operating system
- • Pages visited and time spent
- • Referring website
- • General location (country/region level only)
Contact Form Information
When you contact us through our contact form, we collect:
- • Name and email address
- • Subject and message content
- • Date and time of submission
This information is used solely to respond to your inquiry and provide support.
Newsletter Subscription
If you subscribe to our newsletter, we collect:
- • Email address
- • Subscription date
- • Email interaction data (opens, clicks)
You can unsubscribe at any time using the link in any email we send.
How We Use Information
Service Operation
- • Provide and maintain our calculator tools
- • Improve website performance and user experience
- • Monitor and analyze website usage patterns
- • Detect and prevent technical issues
Communication
- • Respond to your inquiries and support requests
- • Send newsletter updates (with your consent)
- • Notify you of important service changes
- • Provide educational content about statistics
What We DON'T Do
- • Sell your information to third parties
- • Use your calculation data for any purpose
- • Send spam or unsolicited marketing emails
- • Share your personal information without consent
Cookies and Tracking Technologies
Essential Cookies
We use essential cookies to ensure our website functions properly. These cannot be disabled as they're necessary for basic website functionality.
Analytics Cookies
We may use analytics tools (like Google Analytics) to understand how visitors use our site. This helps us improve our content and user experience. You can opt out of analytics tracking through your browser settings.
Preference Cookies
We may store your preferences (like newsletter subscription status) to enhance your experience on return visits.
Data Security
We implement appropriate security measures to protect your information:
Technical Measures
- • HTTPS encryption for all communications
- • Secure server hosting with regular updates
- • Regular security audits and monitoring
- • Limited access to personal information
Operational Measures
- • Staff training on privacy protection
- • Data minimization practices
- • Regular backup and recovery procedures
- • Incident response protocols
Note: While we implement strong security measures, no method of transmission over the Internet is 100% secure. We cannot guarantee absolute security but we strive to use commercially acceptable means to protect your information.
Your Rights and Choices
Access and Correction
You have the right to access and correct any personal information we have about you. Contact us if you need to update your information.
Data Deletion
You can request deletion of your personal information. We will comply with deletion requests except where retention is required by law.
Newsletter Unsubscribe
You can unsubscribe from our newsletter at any time by clicking the unsubscribe link in any email or contacting us directly.
Browser Settings
You can control cookies and tracking through your browser settings. Note that disabling certain cookies may affect website functionality.
Third-Party Services
We may use third-party services to help operate our website:
These third-party services have their own privacy policies. We choose providers that maintain high standards of data protection and limit data sharing to what's necessary for service operation.
Children's Privacy
Our service is designed for general audiences and is safe for students of all ages. We do not knowingly collect personal information from children under 13 without parental consent.
If you are a parent or guardian and believe your child has provided us with personal information, please contact us immediately. We will delete such information from our records.
Changes to This Privacy Policy
We may update this Privacy Policy from time to time. When we make changes:
- • We will update the "Last updated" date at the top of this policy
- • For significant changes, we will provide prominent notice on our website
- • We may send email notifications to newsletter subscribers about important changes
We encourage you to review this Privacy Policy periodically to stay informed about how we protect your information.
Contact Us
If you have any questions about this Privacy Policy or our data practices, please contact us:
Email: privacy@standarddeviationcalculator.app
Contact Form: Use our contact form
Location: Shenzhen, China
Response Time: We typically respond to privacy inquiries within 48 hours
Your Privacy Matters: We're committed to transparency and protecting your privacy. Don't hesitate to reach out with any questions or concerns.