Demand Category

Indicators

A

O

M

I

R

Q

Better Index

Worse Index

Interactivity

1. Friends PK Learning

17

5

4

131

7

1

14.01%

−5.73%

2. Checking-in Learning

29

20

8

103

3

2

30.63%

−17.50%

3. Study in Teams

24

5

7

119

7

3

18.71%

−7.74%

4. Note Sharing

26

9

7

120

2

1

21.60%

−9.88%

Functionality

5. Definition of Words

29

47

15

69

2

3

47.50%

−38.75%

6. Change of Word Meaning

27

11

6

114

5

2

24.05%

−10.76%

7. Notes

41

21

6

93

2

2

38.51%

−16.77%

8. Example Sentences

35

41

10

74

2

3

47.50%

−31.87%

9. Root Affix Association

37

29

12

80

4

3

41.77%

−25.95%

10. Picture Aided Memory

37

13

5

103

4

3

31.65%

−11.39%

11. Video Aided Memory

25

7

6

118

5

4

20.51%

−8.33%

12. Original Movie Sound

36

12

5

106

5

1

30.19%

−10.69%

13. Write Words by Memory

36

19

5

101

3

1

34.16%

−14.91%

14. British Pronunciation

28

24

8

103

1

1

31.90%

−19.63%

15. American Pronunciation

29

22

10

100

3

1

31.68%

−19.88%

16. Forgetting Curve

47

26

8

80

3

1

45.34%

−21.12%

17. Derivative

44

21

9

89

0

2

39.88%

−18.40%

18. Phrase

46

21

9

84

3

2

41.88%

−18.75%

19. Word Group

43

23

10

88

0

1

40.24%

−20.12%

20. Meaning Discrimination

41

21

11

90

1

1

38.04%

−19.63%

21.Words Downloaded Offline

42

22

13

85

2

1

39.51%

−21.60%

22. English Listening

36

20

8

96

2

3

35.00%

−17.50%

23. Vocabulary Words for Free

41

47

7

66

1

3

54.66%

−33.54%

24. Search for New Words

35

37

13

78

1

1

44.17%

−30.67%

25. Listening Exercises

42

30

11

81

0

1

43.90%

−25.00%

26. Text Translation

44

32

13

74

1

1

46.63%

−27.61%

27. English Articles Reading

36

22

9

95

1

2

35.80%

−19.14%

28. English Learning Videos

27

17

7

110

3

1

27.33%

−14.91%

29. Past Exam Papers

51

30

8

74

1

1

49.69%

−23.31%

Designability

30. Simple Interface

47

32

11

72

2

1

48.77%

−26.54%

31. Word Lock Screen Wallpaper

29

8

9

114

4

1

23.13%

−10.63%

32. APP Background Image

26

6

8

119

5

1

20.13%

−8.81%

Motility

33. Calendar Reminders

33

18

8

103

1

2

31.48%

−16.05%

34. Gold/Points Rewards

27

10

7

115

4

2

23.27%

−10.69%

Personalization

35. Import/Export Vocabulary Books

42

20

8

93

1

1

38.04%

−17.18%

36. Payment for Vocabulary

3

2

0

95

62

3

5.00%

−2.00%

37. Membership System

5

5

5

118

31

1

7.52%

−7.52%

38. Word Book

36

39

9

77

2

2

46.58%

−29.81%

39. Dictionary

45

25

9

83

2

1

43.21%

−20.99%