Membership rules

1. Free

Free with no time limit: all foundation exercise chapters, tests, completion certificates, Stage 1 lessons and the AI Tutor with a daily limit.

2. Pro

Adds Stage 2 lessons, more AI Tutor questions (limits shown in the app) and detailed learning reports. The term starts at activation for the number of months in the plan; buying again while active adds the time on.

3. Family

The owner invites up to the number of members stated on the plan (each with their own account); every active member gets Pro until the plan expires. The owner only sees progress from members who enabled sharing.

4. Teacher

Teachers create classes, assign work and tests and see reports. Each student who joins a class uses one license seat (a student in several classes of the same teacher counts once). Students get Pro while they are class members and the license is valid; leaving the class or license expiry only removes the class access, and personal or Family Pro is kept.

5. Expiry

When a plan expires, the account returns to Free. All work, progress and learning history is kept.

6. Cancelling renewal

Plans never renew automatically. You can turn off renewal reminders on the My plan page; benefits remain until the paid period ends.

7. Changes to benefits

AI limits may be adjusted to keep the service reliable; changes are announced on the website in advance.

Updated: 30 Oct 2026.

If the Vietnamese and English versions differ, the Vietnamese version prevails.