Grammatica is an italian term stands for grammar.
Anyway, the name is italian, but this application works only with well formed english sentences.
You can write down any "natural language" sentence and this analyzer will split the sentence in its lexical components. Longer is the phrase, more accurate is the analysis.
You can see the phrase splitted in nouns, verbs, adjectives, pronouns, etc. and you can also send by mail or post to Facebook (iOS 6 or greater) the result of this analysis. More details are provided to inform you about proper names, phone numbers, addresses and date-time indications contained in the phrase.
This is an educational application and can help you in your first steps in english language. Anyway, don't use this application during class.