The Short Version
- ✓Your health measurements are processed on your device. We do not store them on any server unless you choose to email yourself a report.
- ✓We only collect your email address when you voluntarily request a report to be emailed to you.
- ✓We do not sell your data to anyone. Ever.
- ✓We use cookies only for essential functionality (theme preference). No advertising cookies.
1. Overview
Health Calculators ("we", "us", or "our") operates the website at https://www.smarthealthcalculators.com (the "Service").
This Privacy Policy describes how we collect, use, and handle your information when you use our Service. By using Health Calculators, you agree to the collection and use of information in accordance with this policy.
This policy applies to all visitors and users of Health Calculators, including free and premium users.
2. Data We Collect
2.1 Health Measurements (Calculator Inputs)
When you use our calculators, you enter data such as:
- Age, gender, height, weight
- Body measurements (neck, waist, hip circumference)
- Activity level and fitness goals
- Dietary preferences
2.2 Email Address
If you choose to email your health report to yourself, you provide your email address. This email address is used solely to send you the requested report via our email service provider (Resend). We do not store your email address in a database. The email is sent once and not retained on our servers beyond the delivery process.
2.3 Payment Information (Premium Users)
When you purchase the premium Complete Health Assessment, payment is processed securely through PayPal. We do not collect, store, or have access to your credit card number, bank account details, or any full payment information. PayPal's privacy policy governs the handling of your payment data. We receive only a transaction confirmation.
2.4 Usage Data (Automatically Collected)
We may automatically collect certain information when you visit our website, including:
- IP address (anonymized)
- Browser type and version
- Pages visited and time spent
- Referring website
- Device type (mobile, desktop, tablet)
This data is collected in aggregate and cannot be used to identify you personally. It is used to improve the website and understand usage patterns.
2.5 Name (Optional)
The Complete Assessment form has an optional "Full Name" field. This name is used only to personalize your on-screen results and email/PDF report. It is not stored on our servers.
3. How We Use Your Data
We use the data we collect for the following purposes:
Providing the Service
To perform health calculations and display results to you.
Sending Reports
To email you the health assessment report when requested.
Payment Processing
To verify your payment for premium features via PayPal.
Improving the Service
To understand how users interact with calculators and improve their accuracy and usability.
Security
To detect, prevent, and address technical issues and fraudulent activity.
Legal Compliance
To comply with applicable laws, regulations, and legal requests.
- • Sell your data to third parties
- • Use your health data for advertising or marketing profiling
- • Share your email address with other companies for their marketing
- • Use your data for purposes not listed in this policy without notifying you
4. Data Storage & Security
On-device storage: Your health measurements and form data are saved in your browser's localStorage. This means the data lives only on your device. Clearing your browser data removes it. We never receive this data unless you take a specific action (such as requesting an email report).
Email delivery: When you request an email report, your email address and health data are transmitted securely (HTTPS/TLS) to our email service provider (Resend) to deliver the report. Resend retains email delivery logs for a limited period per their own privacy policy.
Security measures: Our website uses HTTPS encryption for all data in transit. Access to our systems is restricted to authorized personnel. We use modern security practices including secure HTTP headers and input validation.
Data retention: Because we do not maintain a user account database, there is no long-term retention of your health data on our servers. Email delivery logs (held by Resend) are subject to Resend's data retention policy.
5. Third-Party Services
We use a limited number of third-party services to operate this website:
Vercel (Hosting)
Our website is hosted on Vercel's infrastructure. Vercel processes server logs including IP addresses. See Vercel's Privacy Policy.
Resend (Email Delivery)
Used to send health assessment reports via email when you request them. Your email address is passed to Resend for delivery. See Resend's Privacy Policy.
PayPal (Payment Processing)
Used for secure payment processing on premium purchases. When you pay, you interact directly with PayPal. We do not handle or store your payment credentials. See PayPal's Privacy Policy.
Analytics (Plausible / Google Analytics)
We may use privacy-friendly analytics to understand overall traffic and usage. If using Plausible Analytics, no personal data or cookies are collected. If using Google Analytics, IP addresses are anonymized. No health data is ever shared with analytics providers.
These third parties have their own privacy policies. We are not responsible for the privacy practices of these external services, but we have selected them based on their strong privacy commitments.
6. Your Rights
Depending on your location, you may have certain rights regarding your personal data:
Right to Access
Request a copy of the personal data we hold about you.
Right to Erasure
Request deletion of your personal data ("right to be forgotten").
Right to Rectification
Request correction of inaccurate personal data we hold.
Right to Restrict Processing
Request that we limit how we use your data.
Right to Data Portability
Receive your data in a structured, machine-readable format.
Right to Object
Object to processing of your personal data for certain purposes.
GDPR (EU/UK residents): If you are located in the European Union or United Kingdom, you have rights under GDPR including those listed above. You also have the right to lodge a complaint with your national data protection authority.
CCPA (California residents): If you are a California resident, you have the right to know what personal information is collected, request deletion, and opt-out of any "sale" of personal information. We do not sell personal information.
To exercise any of these rights, please contact us at smarthealthcalculators@gmail.com. We will respond within 30 days.
Deleting your localStorage data: You can delete your on-device health data at any time by clearing your browser's localStorage for this website (Settings → Privacy → Clear browsing data → Cached data, or similar).
8. Children's Privacy
Our Service is not directed to individuals under the age of 13. We do not knowingly collect personal information from children under 13. Our calculators include a minimum age input of 15. If you are a parent or guardian and believe your child has provided us with personal information, please contact us at smarthealthcalculators@gmail.com and we will delete such information.
9. Changes to This Policy
We may update this Privacy Policy from time to time. We will notify you of any significant changes by updating the "Last Updated" date at the top of this page. We encourage you to review this Privacy Policy periodically. Continued use of the Service after any changes constitutes acceptance of the updated policy.
10. Contact Us
If you have questions, concerns, or requests related to this Privacy Policy or your personal data, please contact us:
Website: https://www.smarthealthcalculators.com
Email: smarthealthcalculators@gmail.com
We aim to respond to all privacy-related inquiries within 30 days.