From the Developer
Grammar Guide is an easy to use, quick reference guide with general rules, helpful hints and reference for using grammar. The topics covered are the most troublesome including a glossary of terms, punctuation, capitalization, misused words, misspelled words, when to use numbers and tips for proofreading.
The .Edu Toolbox identified Grammar Guide in an article titled, "40 Awesome Android Apps for College Students." See: http://bestcollegerankings.org/2011/40-awesome-android-apps-for-college-students