Refund Policy
Your satisfaction is our priority. Learn about our fair and transparent refund process.
Last updated: 9/17/2025
Overview
Standard Deviation Calculator provides free online statistical tools and educational content. This refund policy applies to any paid services or premium features we may offer in the future.
Our Commitment:
- • 30-day money-back guarantee for paid services
- • No questions asked refund within the first 7 days
- • Fair evaluation of all refund requests
- • Quick processing within 5-7 business days
Free Services
Current Free Features
All our current calculator tools and educational content are provided free of charge:
- • Standard deviation calculator
- • Variance calculator
- • Mean and statistical measures
- • Educational guides and tutorials
- • Data visualization tools
As these services are free, they are not eligible for refunds. We strive to maintain high availability and accuracy for all free tools.
Paid Services Refund Policy
Eligible for Refund
- • Premium subscriptions within 30 days of purchase
- • Services not delivered as described
- • Technical issues preventing service usage
- • Duplicate charges or billing errors
- • Unauthorized transactions (with proper documentation)
- • Service discontinuation on our end
Not Eligible for Refund
- • Services used beyond the refund period
- • Violation of our Terms of Service
- • Change of mind after extensive usage
- • Issues caused by third-party services
- • Force majeure events
- • Custom or personalized services after delivery
Refund Process
Step 1: Submit Request
Contact us at refunds@standarddeviationcalculator.app with your order details, reason for refund, and any supporting documentation.
Step 2: Review Process
We'll review your request within 2 business days and may contact you for additional information if needed.
Step 3: Decision
You'll receive an email with our decision. Approved refunds include details about the refund amount and timeline.
Step 4: Processing
Approved refunds are processed within 5-7 business days. The refund will be issued to the original payment method.
Note: Bank processing times may add 3-5 additional business days before the refund appears in your account.
Refund Timelines
Credit/Debit Cards
- • Processing: 5-7 business days
- • Bank posting: 3-5 additional days
- • Total: 8-12 business days
PayPal
- • Processing: 3-5 business days
- • Account credit: Immediate
- • Total: 3-5 business days
Cryptocurrency
- • Processing: 1-3 business days
- • Network confirmation: Varies
- • Total: 1-5 business days
Other Methods
- • Processing: 7-10 business days
- • Provider processing: Varies
- • Total: 7-15 business days
Special Circumstances
Service Outages
If our service is unavailable for more than 24 consecutive hours, affected paid subscribers may request a pro-rated refund for the downtime period.
Feature Changes
If we significantly modify or remove features that were primary reasons for your purchase, you may be eligible for a partial refund.
Educational Institutions
Special refund terms may apply for bulk purchases by educational institutions. Please contact us for institutional refund policies.
Dispute Resolution
If you're not satisfied with our refund decision, you have several options:
1. Appeal Process
Submit an appeal to appeals@standarddeviationcalculator.app with additional information or clarification. Appeals are reviewed by senior management.
2. Mediation
We're open to third-party mediation for disputes exceeding $100. Both parties must agree to the mediator and share costs equally.
3. Chargeback Rights
You may have chargeback rights through your payment provider. However, we encourage contacting us first to resolve issues amicably.
Policy Updates
We may update this Refund Policy from time to time to reflect changes in our services or legal requirements.
Notification of Changes
- • Updates posted on this page with new "Last updated" date
- • Email notifications for significant changes to paid subscribers
- • 30-day notice for material changes affecting existing subscriptions
- • Grandfathering of favorable terms for existing customers when possible
Contact Us
For refund requests or questions about this policy, please contact us:
Refund Requests: refunds@standarddeviationcalculator.app
General Support: support@standarddeviationcalculator.app
Contact Form: Use our contact form
Location: Shenzhen, China
Response Time: Within 2 business days
Customer Satisfaction: We're committed to your satisfaction and will work with you to resolve any issues fairly and promptly.