The contents of this app are:

1. Noun
2. Pronouns
3. Adjective
4. Verb
5. Adverb
6. Preposition
7. Conjunction
8. Interjection
9. Singular and plural
10. Tenses
11. Definite Article
12. Indefinite Article
13. Clause
14. Concord
15. Gender
16. Punctuation
17. Letter writing
18. Figures of speech
19. Idioms
20. Essay
21. Summary
22. Comprehension
23. Persons
24. Prefix and Suffix
25. Possessive 's'
26. Regular and Irregular verbs
27. Direct and Indirect speech
28. Active and passive voice
29. Conditional Sentences
30. Questions tags
31. Common Mistakes in English