Plans
For teachers, tutors and parents. Students never pay.
Free
Trying it out
Free
- Unlimited library downloads
- About 5 worksheets a month
- Full question bank access
- 3 watermarked diagrams
- Light ads
Most popular
Plus
Tutors and parents
HK$68/month
- Unlimited worksheets
- 3 classes with auto-marked homework
- About 30 diagrams a month
- DOCX and PDF export
- Ad-free
Studio
Full-time tutors
HK$168/month
- Everything in Plus
- 10 narrated video explainers
- About 150 diagrams a month
- Custom style profile
- Own-voice narration — English, 繁體, Cantonese
Already on Plus at US$7.99? That price stays yours for as long as you keep the plan.
Need more this month?
about 12 extra diagrams
US$2.99
about 50 extra diagrams
US$7.99
about 120 extra diagrams
US$14.99
What a credit buys
- One AI credit covers about 5,000 tokens of AI text work — roughly 3,500 words read or written.
- Importing a document, extracting questions and auto-marking all draw on credits.
- Diagrams, video and audio are counted per item against your monthly allowance, not in credits.
- Library downloads are never metered — they are free on every plan, including Free.
Business information
- Company
- Cardiff Private Limited
- Certificate of Incorporation No.
- 80882496
- Business Registration No.
- 80882496-000-07-26-9
- Incorporated
- 22 July 2026, Hong Kong
- Registered address
- Flat 6E01, 6/F., Mai Gar Industrial Building, No. 146 Wai Yip Street, Kwun Tong, Hong Kong
- [email protected]