Terms for using Redpen.

Updated 19 October 2026. Redpen is provided by Sidebot LLC.

App license

Redpen uses Apple’s Standard Licensed Application End User License Agreement.

Weekly subscription

Redpen costs $4.99 per week in the United States, with a 3-day free trial for eligible subscribers. Apple shows your local price and trial eligibility before purchase. A subscription is required for tutoring.

Payment is charged to your Apple ID account at confirmation of purchase. If eligible, your free trial converts to a paid subscription unless you cancel at least 24 hours before the trial ends.

Your subscription automatically renews unless you cancel at least 24 hours before the current period ends. Your account is charged for renewal within 24 hours before the current period ends.

Manage or cancel your subscription in Apple Settings. Deleting Redpen or your Redpen account does not cancel Apple billing.

Manage your Apple subscription

AI tutoring

Redpen is an AI English tutor app for education. AI corrections can be wrong. Redpen does not guarantee fluency, test results or other learning outcomes.

Redpen asks for consent before sending your confirmed transcript for AI processing. Review the current provider disclosure in the app.