Terms of Service
Last updated: June 27, 2026
By using OptiBio Read or purchasing OptiBio Read Pro, you agree to these terms.
Service
OptiBio Read is a Chrome browser extension that applies bold fixation reading to web page text. It is provided by Dourwork ("we").
License
OptiBio Read Pro grants you a personal, non-transferable, lifetime license to use the extension on devices you own. You may not resell, redistribute, or reverse-engineer the extension.
Free trial
New users receive a 7-day free trial with full feature access. After the trial, Pro features require a one-time purchase.
Payment
OptiBio Read Pro is a one-time payment processed via Dodo Payments. Prices are listed on dourwork.com. All sales are subject to our Refund Policy.
Disclaimer
OptiBio Read is a reading aid tool. We make no guarantees about reading speed improvements. Results vary by individual. The extension is provided "as is" without warranty.
Limitation of liability
Dourwork is not liable for any damages arising from use of OptiBio Read, including but not limited to data loss on web pages modified by the extension.
Changes
We may update these terms. Continued use after changes constitutes acceptance.