Tableur: Handwritten Spreadsheets

The need for back-of-the-envelope calculations, such as rough projections or simple budget estimations, occurs frequently and oftentimes while being away from desktop computers. While major software vendors have optimized their spreadsheet applications for mobile environments their generality still makes them heavyweight for such tasks. We have built Tableur a spreadsheet-like pen- & touch-based system targeted towards these use cases. Our design revolves around handwriting recognition - all data is represented as digital ink - and gestural commands. Through a rethought cell referencing system and by incorporating standard math notation recognition Tableur allows for simple formula creation and we experiment with techniques that support pattern-based prefilling of cells (Smart Fill) and exploration of what-if scenarios (Reverse Editing).