Terms of Service
Last updated: 17 September 2026These terms apply to your use of physicsstudylab.com and your purchase of Physics Study Lab digital products, sold by QUILLSTONE DIGITAL LLC, 1057 NW 136th Ave, Miami, FL 33182, United States ("we", "us"). By buying, you agree to these terms.
1. Products
We sell illustrated digital study guides (PDF) for physics students. What each product includes is described on its offer page.
2. Prices and payment
Prices are shown on the offer page and at checkout. Payment is one-off, with no subscription or recurring charges, and is processed securely by Stripe. The charge appears on your statement as PHYSICSSTUDYLAB.
3. Delivery
Products are delivered by email to the address you give at checkout, normally within a few minutes. By buying, you ask us to deliver the digital content immediately.
4. Refunds
We offer a 30-day money-back guarantee, as described in our Refund Policy. This does not affect your statutory rights.
5. Licence
Your purchase gives you a personal, non-transferable licence to download, print and use the materials for your own study. You may not copy, share, resell, upload or use them commercially. All text and illustrations are protected by copyright.
6. Educational use
Our materials are study aids. They don't replace your school's or exam board's official materials, and results depend on each student.
7. Liability
We take care over our content but can't guarantee it is free of errors. To the extent permitted by law, we are not liable for losses arising from its use. Nothing in these terms limits rights you have as a consumer that cannot be excluded.
8. Contact
Questions? Email info@physicsstudylab.com or visit our Support page.