Legal

Terms of service

Who may hold an account, and parent/guardian responsibility for minors.
The free challenge rules: one challenge per learner, no card required.
Subscriptions: renewal, price-change notice, payment failure and cancellation.
Acceptable use, account security, and no scraping or resale of content.
Our content remains ours; your data remains yours.
No grade, score or admissions guarantees.
Liability terms that preserve your statutory consumer rights.