The three canticles of the Divine Comedy: Inferno, Purgatorio, ParadisoEvery song- is preceded by a brief initial summary;- is accompanied by the notes of Isidoro Del Lungo;- is enriched by illustrations by Gustavo Doré.Search by word / phraseIts possible:- search for an exact text;- search for a text as a sequence of characters within another text;are returned:- the triplets in which the searched text appears;- the count of the occurrences of the searched text for both the "exact" and the "not exact" search.Eg.- exact search for "furo": triplets in which the text "furo" appears;- non-exact search for "furo": triplets in which the text "furo" appears and triplets in which the text "... furo ..." appears, such as "furor", "furore", "furon", "were ".TripletExtrapolation of a random triplet and relative note.Bookmarks"long click" (long press) on a triplet: the triplet is stored in the "Bookmarks" with indication of the date-time of storage.For each triplet stored in the bookmarks it is possible, with a simple "click" (pressure) on the triplet, to display the relative note.For the triplets present in the bookmarks the search is active as for the songs.Font sizeUsing the scroll bar, present in the display of songs, notes, research, bookmarks, it is possible to enlarge / reduce the character of the text; there are three possibilities:- small font (12sp);- medium character (14sp);- large font (16sp);the character can also be changed, as an alternative to scrolling the cursor, by clicking on the bar:- in the beginning for the small font;- about halfway for the medium character;- at the end for the big character. Image sizeThe images (G. Doré and Dantes Oltretomba) can be enlarged / reduced using the classic "pinch to zoom": zooming in on an image by moving two fingers away / closer on the screen.