Reactivepad lets you put calculations directly inside your textual narrative. Expressions can live anywhere in the document, even in the middle of the sentence. For referencing formulas use meaningful names instead of obscure grid coordinates. Stay in the editor and don't waste your time on the unnecessary routine of switching between spreadsheet and doc. You don't have to worry about manual correcting, regardless of how often the data changes. Create truly smart and reactive data-driven documents that are almost like apps!