| Demand Category | Indicators | Indicators Source | Explanation of Index |
| Interactivity | 1. Friends PK Learning | High-Frequency Words | Users can compete with their friends to learn. |
| 2. Checking-in Learning | The LDA Model | Users can clock in and share after learning. | |
| 3. Study in Teams | The LDA Model | Users can do team challenges and get rewards. | |
| 4. Note Sharing | High-Frequency Words | Notes and other aspects can be shared between students. | |
| Functionality | 5. Definition of Words | The LDA Model | Provide detailed definitions when reciting words. |
| 6. Smart Refrigerator | The LDA Model | When reciting a word, you can change the meaning of the word. | |
| 7. Notes | The LDA Model | You can take notes on the APP when reciting words. | |
| 8. Examples | The LDA Model | Provide example sentences when reciting words to show how they are used. | |
| 9. Root Affix Association | The LDA Model | Words that provide the same root affixes when reciting words. | |
| 10. Picture-Aided Memory | The LDA Model | Remember words with pictures to help you remember them. | |
| 11. Video-Aided Memory | The LDA Model | When reciting words, there are related videos to help you remember them. | |
| 12. Original Movie Sound | The LDA Model | When reciting words, there are original movie sound example sentence readings. | |
| 13. Write Words by Heart | The LDA Model | When reciting words, there are word spelling or silent writing modules. | |
| 14. British Pronunciation | The LDA Model | Recite the words with British pronunciation. | |
| 15. American Pronunciation | The LDA Model | Recite the words with American pronunciation. | |
| 16. Forgetting Curve | High-Frequency Words | Vocabulary review time is arranged according to the forgetting curve. | |
| 17. Derivative | High-Frequency Words | There are derivative hints when reciting words. | |
| 18. Phrase | The LDA Model | When reciting words, there are related phrase prompts. | |
| 19. Word Group | The LDA Model | Show the related phrases when reciting the words. | |
| 20. Meaning Discrimination | The LDA Model | When reciting words, it is shown by meaning discrimination. | |
| 21. Words Downloaded Offline | The LDA Model | Words can be downloaded offline. | |
| Functionality | 22. English Listening | The LDA Model | You can listen to words on a walkman. |
| 23. Vocabulary Words for Free | The LDA Model | Vocabulary is free when memorizing words. | |
| 24. Search for New Words | The LDA Model | You can search for words you don’t know. | |
| 25. Listening Exercises | The LDA Model | You can practice listening. | |
| 26. Text Translation | High-Frequency Words | Text translation is available. | |
| 27. English Articles Reading | High-Frequency Words | English reading can be trained. | |
| 28. English Learning Videos | High-Frequency Words | There are instructional videos for learning English. | |
| 29. Past Exam Papers | The LDA Model | There are old exam questions on display. | |
| Designability | 30. Simple Interface | The LDA Model | APP interface is simple and clean, and easy to operate. |
| 31. Word Lock Screen Wallpaper | The LDA Model | Provide word lock screen service. | |
| 32. APP Background Image | The LDA Model | APP background pictures have a sense of design. | |
| Motility | 33. Calendar Reminders | High-Frequency Words | You can use a calendar to remind you of your vocabulary learning schedule. |
| 34. Gold/Points Rewards | The LDA Model | After completing the study, the user will be rewarded. | |
| Personalization | 35. Import/Export Vocabulary Books | The LDA Model | You can import/export word books. |
| 36. Payment for Vocabulary | The LDA Model | Vocabulary pay for custom purchase when memorizing words. | |
| 37. Membership System | High-Frequency Words | Membership services. | |
| 38. Word Book | The LDA Model | You can choose your own word book to recite. | |
| 39. Dictionary | The LDA Model | You can choose your own dictionary definition when memorizing words. |