Digital platforms providing instant homework assistance through AI-powered answers, expert tutors, and extensive study resource libraries. Students can upload questions, receive step-by-step solutions, and access textbook solutions across all subjects.

Monthly or annual subscription fees for unlimited access to homework solutions, study guides, and Q&A services. Premium tiers offer faster response times, live tutor access, and ad-free experiences.

• Response accuracy

  Percentage of homework solutions that are correct and helpful

• Usage frequency

  Average number of questions submitted per active user per month

• Retention

  Percentage of subscribers who renew their memberships

Chegg, Course Hero, 수학대왕