Apps like Oxford A-Z of English Usage

Here are some great alternatives to Oxford A-Z of English Usage by MobiSystems :
Singular Plural Words
Singular Plural Words
★3.2
Oxford Vocabulary PRO
Oxford Vocabulary PRO
★4.5
Spelling and Grammar
Spelling and Grammar
★4.6
Fastdic - Fast Dictionary
Fastdic - Fast Dictionary
★4.5
Zar Dictionary
Zar Dictionary
★4.8
NAVER Dictionary
NAVER Dictionary
★3.5
3000 English vocabulary Awabe
3000 English vocabulary Awabe
★4.5
English Thesaurus
English Thesaurus
★3.3
English Thesaurus
English Thesaurus
★3.5
English Dictionary Offline
English Dictionary Offline
★3.8
Dictionary - WordWeb
Dictionary - WordWeb
★4.4
Power Thesaurus
Power Thesaurus
★4.8
Spell and Pronounce It Right
Spell and Pronounce It Right
★4.8
English Dictionary Dunno
English Dictionary Dunno
★4.9
Pronunciation App English
Pronunciation App English
★3.7
Offline English Dictionary
Offline English Dictionary
★4.2